IT

OpenAPI Specification

spec.openapis.org

The industry-standard specification for describing HTTP APIs, enabling code generation and documentation.

Hoppscotch

hoppscotch.io

Open-source, lightweight API development ecosystem — REST, GraphQL, WebSocket, and SSE client.

GraphQL

graphql.org

Query language and runtime for APIs enabling clients to request exactly the data they need.

gRPC

grpc.io

High-performance, open-source RPC framework using Protocol Buffers, with multi-language support.

AsyncAPI

asyncapi.com

Open standard for defining event-driven and message-driven APIs — the OpenAPI equivalent for async systems.

Apache Kafka

kafka.apache.org

Distributed event streaming platform used for high-throughput data pipelines, event sourcing, and messaging.

RabbitMQ

rabbitmq.com

Reliable open-source message broker supporting AMQP, MQTT, and STOMP with flexible routing patterns.

NATS

nats.io

Lightweight, high-performance cloud-native messaging system for microservices, edge, and IoT.

Redpanda

redpanda.com

Kafka-compatible event streaming platform with a single-binary architecture and self-managed or cloud deployment options.

Swagger / Swagger UI

swagger.io

Tooling for OpenAPI — Swagger Editor, Swagger UI for documentation, and Codegen for API stubs.

JSON Schema

json-schema.org

Open specification and documentation for describing, validating, and annotating JSON data.

Protocol Buffers

protobuf.dev

Official documentation for Google Protocol Buffers, a language-neutral binary serialization format.

Postman

www.postman.com

API platform for designing, sending, testing, documenting, and monitoring API requests.

Insomnia

insomnia.rest

Open-source desktop client for testing and debugging REST, GraphQL, gRPC, and WebSocket APIs.

Amazon Web Services

aws.amazon.com

The world's most comprehensive cloud platform with 200+ services from compute to AI and edge.

Google Cloud

cloud.google.com

Google's cloud platform with strengths in data analytics, ML infrastructure, Kubernetes, and global networking.

Microsoft Azure

azure.microsoft.com

Microsoft's enterprise cloud platform with tight Active Directory integration and hybrid cloud capabilities.

DigitalOcean

digitalocean.com

Developer-friendly cloud with simple pricing, managed Kubernetes, databases, and an excellent tutorials library.

Hetzner

hetzner.com

German cloud and dedicated server provider with excellent price-to-performance, popular in the European tech community.

Fly.io

fly.io

Platform for running full-stack apps and databases close to users with WireGuard-based private networking.

Cloudflare Workers

workers.cloudflare.com

Serverless compute platform running JavaScript/WASM at the network edge in 300+ cities globally.

OVHcloud

ovhcloud.com

European cloud and hosting provider with bare-metal, VPS, managed Kubernetes, and object storage.

Render

render.com

Unified cloud for web services, static sites, cron jobs, and databases with Git-based deployments.

Akamai Cloud Computing

www.linode.com

Akamai cloud compute services for virtual machines, Kubernetes, storage, databases, and networking.

Scaleway

www.scaleway.com

European cloud provider offering compute, managed Kubernetes, databases, serverless services, and object storage.

Vercel

vercel.com

Managed deployment platform for web applications with preview environments, serverless functions, and edge delivery.

Docker Documentation

docs.docker.com

Official Docker documentation for containerisation — engine, Compose, build, and registry.

Podman

podman.io

Daemonless, rootless container engine compatible with Docker CLI and Compose, from Red Hat.

Kubernetes

kubernetes.io

Open-source container orchestration system for automated deployment, scaling, and management of containerised workloads.

k3s

k3s.io

Lightweight, certified Kubernetes distribution from Rancher/SUSE optimised for edge and resource-constrained environments.

Helm

helm.sh

The package manager for Kubernetes, managing application lifecycle through charts and templating.

Kustomize

kustomize.io

Kubernetes-native configuration management that customises YAML manifests without templating.

Argo CD

argoproj.github.io

Declarative, GitOps continuous delivery tool for Kubernetes syncing cluster state from Git repositories.

Flux

fluxcd.io

CNCF GitOps toolkit for keeping Kubernetes clusters in sync with configuration sources automatically.

containerd

containerd.io

CNCF-graduated container runtime used as the standard OCI runtime inside Docker, Kubernetes, and other platforms.

CNCF Landscape

cncf.io

Cloud Native Computing Foundation hosting Kubernetes, Prometheus, and 100+ projects shaping cloud-native infrastructure.

Open Container Initiative

opencontainers.org

Linux Foundation project maintaining open image, runtime, and distribution specifications for containers.

CRI-O

cri-o.io

OCI-compatible container runtime implementing the Kubernetes Container Runtime Interface.

kind

kind.sigs.k8s.io

Kubernetes SIG-maintained tool for running local Kubernetes clusters using container nodes.

PostgreSQL

postgresql.org

The world's most advanced open-source relational database with strong ACID compliance and extensibility.

SQLite

sqlite.org

Self-contained, serverless SQL database engine — the most widely deployed database in the world.

DuckDB

duckdb.org

In-process analytical SQL database with columnar storage, designed for fast OLAP queries on local files.

ClickHouse

clickhouse.com

Column-oriented database for real-time analytics capable of processing billions of rows per second.

Redis

redis.io

In-memory data structure store used as cache, message broker, and session store with persistence options.

MongoDB

mongodb.com

Leading document-oriented NoSQL database with flexible schema, rich query language, and Atlas cloud service.

MinIO

min.io

High-performance, S3-compatible object storage for on-premises and cloud environments.

Apache Cassandra

cassandra.apache.org

Highly scalable, distributed NoSQL database designed for high-availability with no single point of failure.

CockroachDB

cockroachlabs.com

Distributed SQL database with geo-partitioning, horizontal scaling, and PostgreSQL wire compatibility.

Elasticsearch

elastic.co

Distributed search and analytics engine at the core of the Elastic Stack, used for full-text search and log analysis.

MariaDB Foundation

mariadb.org

Official home of the MariaDB open-source relational database server and its documentation.

Ceph

ceph.io

Open-source distributed storage platform providing object, block, and file interfaces from one cluster.

OpenZFS

openzfs.org

Open-source storage platform combining a filesystem and volume manager with checksums, snapshots, and replication.

FoundationDB

www.foundationdb.org

Open-source distributed key-value database designed for strict serializable transactions and composable data models.

VS Code

code.visualstudio.com

Microsoft's open-source code editor with a vast extension marketplace and deep language server protocol support.

JetBrains IDEs

jetbrains.com

Suite of professional IDEs for Python, Java, Kotlin, Go, Rust, PHP, and web development.

Neovim

neovim.io

Hyperextensible Vim-based text editor with Lua-based configuration and a rich plugin ecosystem.

Zed

zed.dev

High-performance, multiplayer code editor built in Rust with AI assistance and real-time collaboration.

Git

git-scm.com

The distributed version control system — official documentation, reference manual, and Pro Git book.

GitLab

gitlab.com

Complete DevSecOps platform with self-hosted and SaaS options for code, CI/CD, and project management.

Gitea

gitea.com

Lightweight, self-hosted Git service with GitHub-compatible interface and low resource requirements.

tmux

github.com

Terminal multiplexer for managing multiple terminal sessions, panes, and windows in a single connection.

devenv.sh

devenv.sh

Nix-based tool for declarative, reproducible development environments with direnv integration.

Language Server Protocol

microsoft.github.io

Official protocol specification for language features shared between editors and language servers.

EditorConfig

editorconfig.org

File format and editor plugin ecosystem for sharing basic coding-style settings across tools.

direnv

direnv.net

Shell extension that loads and unloads project-specific environment variables when changing directories.

GitHub CLI

cli.github.com

Official command-line interface for GitHub repositories, issues, pull requests, releases, and workflows.

GitHub Actions

docs.github.com

CI/CD automation platform built into GitHub with a large marketplace of reusable actions.

GitHub Pages

docs.github.com

Documentation for hosting static sites from GitHub repositories with Jekyll or custom workflows.

GitLab CI/CD

docs.gitlab.com

Official GitLab CI/CD documentation for pipelines, runners, jobs, environments, and deployment workflows.

Dagger

dagger.io

Portable CI/CD engine that runs pipelines as code in containers, locally and on any cloud.

Earthly

earthly.dev

Build automation tool combining Makefile and Dockerfile concepts for reproducible, container-based builds.

Tekton

tekton.dev

CNCF cloud-native CI/CD framework running pipelines as Kubernetes-native resources.

Buildkite

buildkite.com

Scalable CI/CD platform using your own infrastructure as agents, with fast pipelines and a clean interface.

Argo Workflows

argoproj.github.io

Kubernetes-native workflow orchestration engine for running parallel jobs, DAGs, and data pipelines.

Jenkins

jenkins.io

The most widely-used open-source automation server with a vast plugin ecosystem for CI/CD pipelines.

GNU Make

www.gnu.org

GNU build automation tool for expressing file dependencies and reproducible command workflows.

Bazel

bazel.build

Open-source build and test tool supporting large, multi-language repositories with hermetic and incremental builds.

Woodpecker CI

woodpecker-ci.org

Open-source CI engine using container-based pipeline steps and common Git forge integrations.

Terraform

terraform.io

HashiCorp's infrastructure-as-code tool for provisioning and managing cloud resources across 1,500+ providers.

OpenTofu

opentofu.org

Open-source, community-driven fork of Terraform under the Linux Foundation, API-compatible with Terraform.

Ansible

ansible.com

Red Hat's agentless automation platform for configuration management, application deployment, and orchestration.

Pulumi

pulumi.com

Infrastructure as code using general-purpose languages (Python, TypeScript, Go) rather than DSLs.

NixOS

nixos.org

Linux distribution built on the Nix package manager enabling reproducible, declarative system configuration.

Crossplane

crossplane.io

CNCF project extending Kubernetes to manage cloud infrastructure as Kubernetes custom resources.

Packer

packer.io

HashiCorp tool for building identical machine images across multiple platforms from a single configuration.

Salt Project

saltproject.io

Event-driven infrastructure automation and configuration management tool for large-scale systems.

cloud-init

cloud-init.io

Cross-platform standard and tool for initializing cloud instances from provider metadata and user data.

Vagrant

developer.hashicorp.com

Official documentation for defining and managing reproducible virtual-machine development environments.

Puppet Documentation

www.puppet.com

Official documentation for Puppet declarative configuration management and infrastructure automation.

Chef Infra Documentation

docs.chef.io

Official documentation for Chef Infra configuration management, resources, cookbooks, and clients.

Nginx

nginx.org

High-performance web server, reverse proxy, and load balancer widely used for serving and proxying HTTP traffic.

HAProxy

haproxy.org

Industry-standard open-source TCP/HTTP load balancer and proxy server known for reliability and performance.

Caddy

caddyserver.com

Modern web server with automatic HTTPS, simple configuration syntax, and a powerful plugin ecosystem.

IANA

iana.org

Internet Assigned Numbers Authority maintaining root DNS, IP address allocations, and protocol parameter registries.

RIPE NCC

ripe.net

Regional Internet Registry for Europe, the Middle East, and Central Asia — IP allocation, routing data, and RPKI.

BGP.tools

bgp.tools

Real-time BGP routing table, AS path lookup, and prefix visibility tool used by network engineers.

Hurricane Electric BGP Toolkit

bgp.he.net

Network lookup tools covering BGP prefixes, ASNs, peering, and route origin for internet infrastructure analysis.

Wireshark

wireshark.org

The world's most widely-used network protocol analyser for packet capture, filtering, and deep inspection.

Tailscale

tailscale.com

Zero-config WireGuard-based mesh VPN for securely connecting devices across any network.

Envoy Proxy

envoyproxy.io

High-performance, cloud-native L7 proxy and service mesh data plane used in Istio and as a standalone edge proxy.

iPerf3

software.es.net

ESnet-maintained tool for active measurement of TCP, UDP, and SCTP network throughput.

FRRouting

frrouting.org

Open-source routing suite implementing BGP, OSPF, IS-IS, and other protocols for Linux and Unix systems.

OpenWrt

openwrt.org

Linux operating system for embedded network devices with package management and extensive routing features.

IPv6 Specification — RFC 8200

datatracker.ietf.org

Internet Standards Track specification defining Internet Protocol version 6.

Hacker News

news.ycombinator.com

Y Combinator's technology and startup discussion board — fast-moving, high signal, from devs and founders.

Lobsters

lobste.rs

Technology-focused link aggregator with invitation-only membership and tagging — higher signal-to-noise than HN.

The Register

theregister.com

British tech news site with sharp, sceptical commentary on industry, security, and enterprise technology.

InfoQ

infoq.com

Practitioner-focused coverage of software architecture, engineering culture, and emerging technology trends.

TLDR Newsletter

tldr.tech

Daily email digest of the most interesting tech, programming, and AI news — 5-minute read format.

The Changelog

changelog.com

Podcasts, newsletters, and articles for developers covering open-source, software development, and tech culture.

SRE Weekly

sreweekly.com

Weekly newsletter curating the best SRE, reliability, and on-call engineering content from around the web.

Stack Overflow

stackoverflow.com

The world's largest Q&A platform for programming questions across all languages and frameworks.

LWN.net

lwn.net

Independent publication covering the Linux kernel, free software, and open-source development in technical depth.

ACM Queue

queue.acm.org

Practitioner magazine from ACM publishing long-form articles on software and systems engineering.

USENIX

www.usenix.org

Technical association publishing open systems research, conference proceedings, and practitioner materials.

Prometheus

prometheus.io

Open-source monitoring and alerting toolkit with a pull-based model and a powerful query language (PromQL).

Grafana

grafana.com

Open-source analytics and visualization platform for metrics, logs, and traces with 100+ data source plugins.

OpenTelemetry

opentelemetry.io

CNCF standard for collecting telemetry — traces, metrics, and logs — with vendor-neutral SDKs and collectors.

Jaeger

jaegertracing.io

CNCF distributed tracing platform for monitoring microservice transactions and diagnosing latency problems.

Grafana Loki

grafana.com

Horizontally scalable log aggregation system inspired by Prometheus, designed to store logs efficiently.

Sentry

sentry.io

Error tracking and performance monitoring for frontend, backend, and mobile applications with detailed stack traces.

VictoriaMetrics

victoriametrics.com

Fast, cost-effective, and scalable time series database and monitoring solution, Prometheus-compatible.

Vector

vector.dev

High-performance observability data pipeline for collecting, transforming, and routing logs and metrics.

Netdata

netdata.cloud

Real-time performance monitoring for systems, containers, and applications with a 1-second resolution.

Zabbix

www.zabbix.com

Open-source monitoring platform for servers, networks, applications, services, and synthetic checks.

SigNoz

signoz.io

Open-source observability platform for traces, metrics, and logs built around OpenTelemetry.

OpenMetrics

openmetrics.io

CNCF specification for transmitting cloud-native metrics at scale.

Grafana Tempo

grafana.com

Open-source distributed tracing backend designed for high-scale storage and OpenTelemetry ingestion.

Python

python.org

General-purpose, high-level language dominant in data science, AI/ML, scripting, and backend development.

Go

go.dev

Statically typed, compiled language from Google with fast compile times, garbage collection, and built-in concurrency.

Rust

rust-lang.org

Systems programming language focused on memory safety without garbage collection, with a modern toolchain.

TypeScript

typescriptlang.org

Strongly typed superset of JavaScript that compiles to plain JS, developed and maintained by Microsoft.

Deno

deno.com

Secure JavaScript and TypeScript runtime with built-in tooling, native Web APIs, and npm compatibility.

Elixir

elixir-lang.org

Functional language running on the Erlang VM, optimised for building fault-tolerant, distributed, real-time systems.

Zig

ziglang.org

Low-level systems language focused on simplicity, explicit control, and C interoperability without a preprocessor.

Ruby

ruby-lang.org

Dynamic, object-oriented language known for developer ergonomics and the Rails web framework.

Kotlin

kotlinlang.org

Modern, statically typed JVM language from JetBrains, the preferred language for Android and a growing server-side choice.

Java

dev.java

Official Java learning and reference portal covering the language, JVM, tools, and current JDK releases.

Node.js

nodejs.org

Open-source JavaScript runtime for servers, command-line tools, and network applications.

PHP

www.php.net

Official PHP language site with documentation, release information, and extension references.

C#

learn.microsoft.com

Official Microsoft documentation for the C# language and its .NET development tools.

Swift

www.swift.org

Official home and documentation for the open-source Swift programming language.

IETF

ietf.org

Internet Engineering Task Force producing open internet standards including TCP/IP, HTTP, DNS, and TLS.

RFC Editor

rfc-editor.org

Authoritative archive of Request for Comments documents defining Internet protocols and standards.

W3C

w3.org

World Wide Web Consortium developing open web standards for HTML, CSS, SVG, WebAssembly, and Linked Data.

ECMA International

ecma-international.org

Standards body responsible for ECMAScript (JavaScript), the language spec behind every browser and runtime.

Linux Foundation

linuxfoundation.org

Non-profit hosting Linux, Kubernetes, CNCF, OpenSSF, and hundreds of other critical open-source projects.

Apache Software Foundation

apache.org

Non-profit hosting Apache Kafka, HTTP Server, Spark, Airflow, and 200+ critical open-source projects.

OpenSSF

openssf.org

Open Source Security Foundation improving security across the open-source ecosystem through tools and standards.

OASIS Open

oasis-open.org

Standards consortium advancing open standards for cybersecurity, IoT, and cloud including STIX and ODATA.

IEEE Standards

standards.ieee.org

IEEE standards for networking (802.11 Wi-Fi, 802.3 Ethernet), software engineering, and power systems.

WHATWG

whatwg.org

Standards community maintaining the HTML and DOM Living Standards and related web platform specifications.

Unicode Consortium

www.unicode.org

Organization maintaining the Unicode Standard, character database, and internationalization specifications.

POSIX.1-2024

pubs.opengroup.org

The Open Group Base Specifications defining portable operating-system interfaces, shells, and utilities.

Arch Wiki

wiki.archlinux.org

The most comprehensive Linux reference wiki — accurate, detailed, and useful beyond Arch Linux.

man7.org

man7.org

Online Linux manual pages — comprehensive reference for system calls, commands, and libraries.

tldr pages

tldr.sh

Community-maintained simplified man pages with practical examples for common command-line tools.

ExplainShell

explainshell.com

Parses any shell command and visually explains each argument and flag from the relevant man pages.

ShellCheck

shellcheck.net

Static analysis tool for shell scripts that detects common bugs, pitfalls, and portability issues.

Bash Guide (Wooledge)

mywiki.wooledge.org

Thorough, opinionated guide to writing correct Bash scripts, covering quoting, arrays, and common pitfalls.

Systemd

systemd.io

Init system and service manager for Linux with comprehensive documentation for services, timers, and units.

DigitalOcean Community Tutorials

digitalocean.com

High-quality tutorials covering Linux server administration, databases, web servers, and security hardening.

SSH Academy

ssh.com

SSH.com's reference guide covering SSH protocol, key management, tunnelling, and secure file transfer.

cron.help

cron.help

Plain-English cron expression builder and validator with examples for common scheduling patterns.

Debian Administrator's Handbook

debian-handbook.info

Free reference covering Debian installation, package management, networking, services, and administration.

Ubuntu Server Documentation

documentation.ubuntu.com

Official Ubuntu Server guides for installation, networking, storage, security, and common services.

FreeBSD Handbook

docs.freebsd.org

Official handbook for installing, configuring, securing, and administering FreeBSD systems.

Red Hat Product Documentation

docs.redhat.com

Official administration and deployment documentation for Red Hat Enterprise Linux and related infrastructure products.

MDN Web Docs

developer.mozilla.org

Reference for HTML, CSS, JavaScript, browser APIs, and web platform behaviour — the definitive source.

web.dev

web.dev

Google's resource for modern web development — performance, Core Web Vitals, PWAs, and best practices.

Can I Use

caniuse.com

Browser compatibility tables for HTML, CSS, SVG, and JavaScript APIs across all major browsers.

React

react.dev

Meta's declarative UI library for building component-based web and native interfaces.

Vue.js

vuejs.org

Progressive JavaScript framework for building user interfaces with an approachable, performant, and versatile design.

Svelte

svelte.dev

Compiler-based frontend framework that shifts work to build time, producing small, fast vanilla JS output.

Tailwind CSS

tailwindcss.com

Utility-first CSS framework for rapidly building custom designs without leaving HTML.

Vite

vite.dev

Official documentation for the Vite frontend build tool and development server.

Astro

astro.build

Web framework for content-heavy sites that ships zero JavaScript by default and supports all major UI frameworks.

Next.js

nextjs.org

React meta-framework from Vercel with hybrid SSR/SSG, App Router, server components, and edge runtime support.

Angular

angular.dev

Official documentation for the Angular web application framework, CLI, libraries, and tooling.

Nuxt

nuxt.com

Vue-based full-stack web framework with server rendering, routing, data fetching, and deployment integrations.

WebAssembly

webassembly.org

Open web standard and portable binary instruction format for running compiled code in browsers and other runtimes.

Web Platform Tests

web-platform-tests.org

Cross-browser conformance test suite for web platform specifications, maintained by browser vendors and contributors.