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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

D3

Observable, Inc. · Data visualization

Modular JavaScript library for bespoke, data-driven web graphics: scales, axes, shapes, layouts, geo projections, transitions and DOM selections

ISCOpen sourceFreeLocalNov 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

Express

OpenJS Foundation · Web frameworks & UI

Minimal, unopinionated web framework for Node.js with routing and middleware, the long-standing default for HTTP servers in the Node ecosystem

MITOpen sourceFreeLocalSelf-hostedNov 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

Ghostty

Ghostty project (Mitchell Hashimoto) · Terminals & shells

Native, GPU-accelerated terminal emulator for macOS and Linux written in Zig, with platform-native UI and a cross-platform core library

MITOpen sourceFreeLocalNov 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

Hono

Hono project (Yusuke Wada and contributors) · Web frameworks & UI

Small TypeScript web framework built on Web Standard APIs that runs unchanged on Cloudflare Workers, Deno, Bun, Node.js and other JavaScript runtimes

MITOpen sourceFreeLocalSelf-hostedNov 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

iTerm2

George Nachman (iTerm2 project) · Terminals & shells

Feature-rich terminal emulator for macOS with split panes, profiles, triggers, search, tmux integration and a Python scripting API

GPL-2.0-onlyOpen sourceFreeLocalNov 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

Leaflet

Volodymyr Agafonkin and contributors · GIS & mapping

Lightweight open-source JavaScript library for interactive tile-based web maps with markers, vector layers and a large plugin ecosystem

BSD-2-ClauseOpen sourceFreeLocalNov 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

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