aiusage - Small CLI that inspects your model provider usage and projects end-of-cycle spend so you can throttle or ramp API calls proactively

Chrome DevTools MCP - Let agents programmatically run performance traces, inspect the DOM, and fix web performance issues via DevTools

Browserable - Self-hostable JS library to build browser agents that navigate sites, fill forms, and extract data

Anthropic Agent Skills - Package repeatable capabilities as versioned folders (instructions, scripts, resources) and call them via the new /skills API

OpenAI Realtime Blocks - Copy-pasteable React hooks and components to build voice UIs on top of the Realtime API

LibreChat - Self-hosted chat UI, now with granular access control for agents/prompts/files plus enterprise-ready permissions

Kestra - Open source workflow orchestration platform, YAML and/or UI based (alternative to Airflow and cron)