- Devise : User authentication
- Shrine : File Upload
- CarrierWave : File Upload
- Sidekiq : Background Job
- AssetSync : Synchronises Rails Assets with S3
- Mobility : Translations
- SpreeCommerce : Spree Commerce
- Chartkick : Create beautiful JavaScript charts
- Apartment: Multitenancy for Rails with Postgres schema
- Rails ERD: Generate ERD for Ruby On Rails
- i18n Tasks: i18n-tasks helps you find and manage missing and unused translations
- Responders: Set of responders modules to dry up your Rails
- Pretender: Impersonate from a user to other user
- Faraday: an HTTP client library that provides a common interface over many adapters
- Friendly ID: create pretty URLs and work with human-friendly strings
- ShowFor: quickly show a model information
- JSONAPI::Resources: developing an API server that complies with the JSON:API specification
- ActiveModelSerializers: Serializer for active model
- Fast JSON API: A lightning fast JSON:API serializer for Ruby Objects
- Peatio : Crypto Currency exchange
- ShareTribe : Market Place
- RedMine : Flexible project management
- Tracks : to-do-list manager
- PublicLab : Decision Making community
- CONSUL: Citizen Participation and Open Government Application
- Houdini: Fully-free and open fundraising infrastructure for nonprofits and NGOs
- Zammad: open source helpdesk/customer support system with many features to manage customer communication
- OpenProject: web-based project management software
- SniBox: self-hosted snippet manager
- If Me: community for mental health experiences that encourages people to share their personal stories with trusted allies
- Tutorial