VCR

System for building agents that perform automated tasks. IFTTT alternative.

Transactional email server with a lovely web interface

OpenProject is the leading open source project management software for product, project and portfolio management. A powerful Jira alternative with agile planning, issue tracking, roadmaps, Gantt charts, time tracking, collaboration features, and more. Available on premises or in the cloud. ⭐Star us on GitHub

Open source, self-hosted error catcher for Rails apps, API-compatible with Airbrake so you can host your own error tracking.

Free, open source full-stack web development curriculum covering HTML, CSS, JavaScript, and Ruby on Rails, built by and for the community.

RSpec cheatsheet & Rails app: Learn how to expertly test Rails apps from a model codebase

One beautiful Ruby API for OpenAI, Anthropic, Gemini, Bedrock, Azure, OpenRouter, DeepSeek, Ollama, VertexAI, Perplexity, Mistral, xAI, GPUStack & OpenAI compatible APIs. Chat, Vision, Audio, PDF, Images, Embeddings, Tools, Streaming & Rails integration.

Kanban board tool from 37signals for tracking work visually across a team, built with the same simplicity ethos as their other products.