Langfuse - Langfuse is an open-source LLM engineering platform that helps teams collaboratively debug, analyze, and iterate on their LLM applications.

Middleware.io - Middleware observability platform provides complete visibility into your apps & stack, so you can monitor & diagnose issues anytime, anywhere.

Foil - Foil is a PHP template engine for native PHP templates.

Openlayer - Test, fix, and improve your ML models

Glass - Refract, reflect, disperse, divide. A game of lasers and experimentation.

Helicone AI - Open-source LLM Observability for Developers