Top OPEN-SOURCE GitHub Repositories & Tools (2026)

Open Source Platform for DTC, B2B Commerce, Marketplaces & Omnichannel. REST APIs, TypeScript SDKs, and production-ready Next.js storefront. Self-host it. Own your data. No vendor lock-in. Zero platform fees.

Awesome list of open-source startup alternatives to well-known SaaS products 🚀

VLC media player - plays everything, runs anywhere. Code here: https://code.videolan.org/videolan/vlc

The open-source AI workbench for scientific research

Open source voice AI platform. Self-hosted alternative to Vapi and Retell. On Prem, BYOK across Speech to Speech or LLM/STT/TTS, with a visual workflow builder, MCP native and telephony support.

Ouroboros — self-creating AI agent. Born Feb 16, 2026.

Curated list of the best truly open-source AI projects, models, tools, and infrastructure. Daily updated.

AI-native open-source alternative to Vercel + Sentry + PostHog + Pingdom + Resend + E2B. 440+ CLI operations with drop-in skills for Claude Code, Codex & OpenCode — deployments, analytics, session replay, error tracking, OpenTelemetry, email, sandboxes & AI gateway in one self-hosted Rust binary.

Open-source desktop AI agent for tools, files, knowledge, workflows, and real deliverables.

Open-source Tax Guides for AI agents, reviewed by named CPAs/CAs/EAs. 1,000+ Guides across 190+ jurisdictions. MCP server included. Works with Claude, ChatGPT, Cursor.

A diagnostic performance logging utility for macOS: logs CPU, memory, GPU, network, and battery from the menu bar to help detect and diagnose performance issues. Free, open source, no telemetry.

mouse & keyboard sharing via LAN

📱 Nextcloud Android app

Open-source, multi-platform harness for AI agents - a native, multi-threaded operator's console (JVM, not Electron) to run Claude Code, Codex, Gemini or OpenCode with a real browser, terminal, editor, secrets & 100+ MCP tools. Built for enterprises, science & research.

Comprehensive 2026 OSINT guide — 450+ tools, AI intelligence, methodologies & ethics across 35 sections for investigation & threat intel.

Free, open-source, offline-first Point of Sale for cafes, restaurants, and food businesses.

Automatic, versioned game save sync across devices. Supports Steam, GOG, 20k+ games, emulators. Hoard-Cloud or Self-Host without account or telemetry. Open source (AGPL-3.0).

Fix a wrong keyboard layout on macOS — Latin, Cyrillic and Hebrew (RTL) — by a tap or automatically, locally and over Screen Sharing. Menu-bar app, clipboard-free, free & open-source.

Free, open-source display control for Windows 11: one brightness slider for every monitor (DDC/CI and laptop panels), night light, focus mode, keep awake, per-monitor taskbar hiding and glass, OLED care, your monitor's own settings, hotkeys and a CLI.

Open Source HR and Payroll Software