Black Candy is a self-hosted music streaming server, your personal music center. Has a couple of mobile apps to go along with it. Assumes Docker but you can probably break it out by using the development instructions.
Uses either SQLite or Postgres as its back-end database. Assumes that some form of Nginx is available to do the actual music file serving on the network.
Rauversion is an open source music sharing platform. Rauversion is built on Ruby on Rails.
Audio processing to format mp3 and audio analysis to draw audio peaks. Audio player, embeddable, with chunk range loading processing to save bandwidth. Music publishing preferences, downloadable, private, attribution settings, like creative commons, all rights reserved. Uploads for tracks, albums, and playlists with their meta information. Multi-upload provider local or AWS, other providers could be implemented. Sellable tracks & albums with Stripe, for connected accounts or main account. Tagging tracks, playlists & albums.
Claims to be an easy-to-integrate self-hosted tool to monitor the performance of your Ruby on Rails application. This is a simple and free alternative to the New Relic APM, Datadog or other similar services. Realtime monitoring, throughput, average response time, which bits are the slowest, database queries, delayed_job monitoring, and custom events.
Known to work with Rails v4.2 and later. Requires Redis to hold the stats.
Amazingly, plugs right into Huginn using the default instructions.
How to add Redis caching support to a Ruby on Rails application.
The webapp that powers the OpenStreetmap website. Provides the API. rails If you can do it on openstreetmap.org, you'll be able to do it with this, from user accounts to editing and browsing.
Gitlab is a F/OSS clone of everything Github's website gives you, from collaboration apps to bug tracking to an easier way to use Git on the server side. The repositories here are either their own software, or their own forks of software that Github makes use of. Requires Ruby on Rails.