Thruster

A control plane for self-hosted Rails operations. One place to run, monitor, and maintain apps across mixed infrastructure - Kamal and Docker or native Caddy and Puma. Fleet dashboard, SSH execution, deploys, backups, alerts, and recurring jobs over servers you already own.

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

The web application framework that powers this entire directory - convention over configuration, batteries included.

Self-hosted music streaming server for playing your own audio library from any device, built as a Rails app.

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