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

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

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.

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.