Developer Open Source Tools

Alternative toClaude Code

A coding agent that lives in your terminal.

• 41,110 GitHub stars
• MITLicence MIT

Alternative toUnstructured.io

Convert documents to clean markdown and JSON with open source AI.

• 40,612 GitHub stars
• Apache-2.0Licence Apache-2.0
• #LLM

Alternative toAmplitude

Track events, replay sessions, and run A/B tests, self-hostable

• 40,390 GitHub stars
• MITLicence MIT

Alternative toSnagit

Screenshot and record with 80+ upload destinations on Windows

• 40,336 GitHub stars
• GPL-3.0Licence GPL-3.0

Alternative toLSEG Workspace (formerly Refinitiv Eikon)

Open source foundation model for financial candlestick data

• 40,317 GitHub stars
• MITLicence MIT
• #LLM

Alternative toCourier

Open source notification infrastructure for product teams

• 40,191 GitHub stars
• MITLicence MIT

Alternative toOpenRouter

One OpenAI-compatible key for 635 free LLM endpoints

• 40,166 GitHub stars
• MITLicence MIT
• #LLM

Alternative toElevenLabs

Tokenizer-free multilingual text-to-speech with voice cloning

• 39,999 GitHub stars
• Apache-2.0Licence Apache-2.0
• #AI SDK

Alternative toParasoft C/C++test

C++ testing and mocking framework by Google

• 39,663 GitHub stars
• BSD-3-ClauseLicence BSD-3-Clause

Alternative toAmazon Kendra

AI-powered document understanding with explainable retrieval

• 39,552 GitHub stars
• MITLicence MIT
• #LLM

Alternative toSlack

Team messaging for security-sensitive teams with air-gap support

• 39,416 GitHub stars
• #Chat

Alternative toSocial Links

Collect OSINT data by username effortlessly

• 39,311 GitHub stars
• MITLicence MIT