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Biome

Biome project · Testing & QA

Rust-based formatter and linter for JavaScript, TypeScript, JSX, JSON, CSS and GraphQL that replaces Prettier and ESLint with one binary

MIT OR Apache-2.0Open sourceFreeLocalNov 2, 2026

Bruno

Bruno Software · API development & tooling

Open-source, offline-first API client that stores collections as plain-text .bru files in a Git repository, with a CLI for running requests in CI

MITOpen sourceFreeLocalNov 2, 2026

Bun

Oven · Programming languages & runtimes

All-in-one JavaScript and TypeScript runtime, package manager, bundler and test runner built on JavaScriptCore by Oven

MITOpen sourceFreeLocalSelf-hostedNov 2, 2026

Deno

Deno Land · Programming languages & runtimes

Secure-by-default JavaScript and TypeScript runtime from Deno Land with web-standard APIs, built-in tooling and an optional hosted Deploy service

MITOpen sourceFreeLocalSelf-hostedNov 2, 2026

Docusaurus

Meta Open Source / React team · Documentation tooling

React-based static site generator from Meta for documentation sites with MDX content, versioning, localization and a plugin architecture

MITOpen sourceFreeLocalNov 2, 2026

Drizzle ORM

Drizzle Team · Web frameworks & UI

TypeScript ORM with SQL-like query builder, schema defined in code, migrations through Drizzle Kit, and support for PostgreSQL, MySQL and SQLite drivers

Apache-2.0Open sourceFreeLocalSelf-hostedNov 2, 2026

ESLint

OpenJS Foundation · Testing & QA

Pluggable static analysis tool for JavaScript and TypeScript that finds problems in code through configurable rules and can fix many automatically

MITOpen sourceFreeLocalNov 2, 2026

FastAPI

Sebastián Ramírez (tiangolo) and FastAPI contributors · API development & tooling

In-depth entry

Python web framework for building HTTP APIs from type-annotated functions, with automatic validation through Pydantic and generated OpenAPI documentation

MITOpen sourceFreeLocalSelf-hostedNov 2, 2026

Forgejo

Forgejo project (Codeberg e.V.) · Version control & code hosting

Community-governed self-hosted Git forge forked from Gitea, stewarded by Codeberg e.V., with pull requests, issues, packages and Forgejo Actions

GPL-3.0-or-laterOpen sourceFreeSelf-hostedNov 2, 2026

Git

Git project (Software Freedom Conservancy) · Version control & code hosting

In-depth entry

Distributed version control system that records snapshots of a project's history locally and synchronizes them with remotes such as GitHub, GitLab or a bare repository over SSH

GPL-2.0-onlyOpen sourceFreeLocalSelf-hostedNov 2, 2026

Gitea

Gitea Ltd. / Gitea community · Version control & code hosting

In-depth entry

Lightweight self-hosted Git forge written in Go with repositories, pull requests, issues, packages and GitHub-compatible Actions, deployable as a single binary

MITOpen sourceFreeSelf-hostedNov 2, 2026

GNU Parallel

GNU Project (Ole Tange) · Distributed & parallel computing

Shell tool that runs commands in parallel over input lines on one or several machines, as a drop-in alternative to xargs and shell loops

GPL-3.0-or-laterOpen sourceFreeLocalSelf-hostedNov 2, 2026

Go

Google (Chrome DevTools team) · Programming languages & runtimes

Statically typed, garbage-collected language from Google that compiles to single binaries and is widely used for servers, CLIs and infrastructure tooling

BSD-3-ClauseOpen sourceFreeLocalSelf-hostedNov 2, 2026

Homebrew

Homebrew maintainers · macOS system utilities

In-depth entry

Community-maintained package manager for macOS and Linux that installs command-line tools (formulae) and desktop apps (casks) from the terminal

BSD-2-ClauseOpen sourceFreeLocalNov 2, 2026

Hoppscotch

Hoppscotch · API development & tooling

Open-source API client that runs in the browser or as a desktop app, supports REST, GraphQL and realtime protocols, and can be self-hosted for teams

MITOpen sourceFreeLocalSelf-hostedNov 2, 2026

Jest

OpenJS Foundation · Testing & QA

JavaScript testing framework created at Meta with built-in assertions, mocking, snapshot testing and parallel test execution

MITOpen sourceFreeLocalNov 2, 2026

Julia

The Julia Project · Programming languages & runtimes

Dynamically typed, JIT-compiled language for numerical and scientific computing that aims to combine high-level syntax with compiled-code speed

MITOpen sourceFreeLocalSelf-hostedNov 2, 2026

Lean

Lean FRO · Mathematical & statistical computing

Open-source functional programming language and interactive theorem prover with dependent types, the Mathlib mathematics library and VS Code tooling, stewarded by the Lean FRO

Apache-2.0FreeOpen sourceLocalNov 2, 2026

Mermaid

Mermaid project (Knut Sveidqvist and contributors) · Design & prototyping

JavaScript library that renders flowcharts, sequence, class, state, ER, Gantt and other diagrams from a Markdown-like text syntax

MITOpen sourceFreeLocalNov 2, 2026

MkDocs

MkDocs project (Tom Christie and contributors) · Documentation tooling

Python static site generator for project documentation that builds a navigable site from Markdown files and a single YAML configuration

BSD-2-ClauseOpen sourceFreeLocalNov 2, 2026

Neovim

Neovim project · IDEs & editors

Modal, terminal-based text editor forked from Vim with Lua configuration, a built-in LSP client and Tree-sitter parsing

Apache-2.0Open sourceFreeLocalNov 2, 2026

Next.js

Vercel · Web frameworks & UI

In-depth entry

React framework from Vercel for full-stack web applications with file-based routing, server components, server-side rendering, static generation and API route handlers

MITOpen sourceFreeLocalSelf-hostedNov 2, 2026

Node.js

OpenJS Foundation · Programming languages & runtimes

In-depth entry

Server-side JavaScript runtime built on the V8 engine, governed by the OpenJS Foundation, with npm as its package ecosystem

MITOpen sourceFreeLocalSelf-hostedBroken

Pandoc

John MacFarlane · LaTeX & typesetting

In-depth entry

Universal document converter that translates between Markdown, LaTeX, HTML, DOCX, EPUB, Typst, Jupyter and dozens of other formats, with citeproc and Lua filters

GPL-2.0-or-laterFreeOpen sourceLocalNov 2, 2026

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