Social Stream is a Ruby on Rails engine for building social network websites. It supports contacts, posts, file uploads, private messages and much more.

Social Stream Presence provides everything you need for including presence, instant messaging and video chat services in your social network website, including a complete chat fully integrated with Social Stream.

An open source social networking platform in Ruby on Rails

Partisan is a Ruby library that allows ActiveRecord records to be follower and followable, just like on popular social networks. It’s heavily inspired by acts_as_follower which is no longer maintained.

Adds basic social networking capabilities to your existing application, including users, blogs, photos, clippings, favorites, and more.

CommunityEngine is a free, open-source social network platform for Ruby on Rails applications. Drop it into your new or existing application, and you’ll instantly have all the features of a basic community site.

A Jekyll plugin to add metadata tags for search engines and social networks to better index and display your site's content.

Adds social network login services (OAuth) to Spree

Open Source Social Network written in Ruby on Rail by Less Everything

Inkwell provides simple way to add social networking features like comments, reblogs, favorites, following/followers, communities, categories and timelines to your Ruby on Rails application.

Simplify the definition and storage of "network" relationships, especially useful for social networks.

Adds social network login services (OAuth) to Solidus

Hari is a tool to abstract complex relationships between Ruby objects onto Redis data structures. It allows for expressive querying of those relationships as well, in an easy way. It is mostly geared towards typical social networking concepts like news feeds, activity log...

Check how many times url was shared in social networks, e.g. share counts.

EngineY is an easy to use social network framework and portal implemented in Ruby on Rails that is easy to customize and deploy as your own powerful social media site or other portal type site. Empower users with their own blogs. Enhance collaboration with forums, groups and events. Let your user...

Add social network capabilities to your projects.

Social networking components, including the feed tool

Administrative and social network platform for closed user groups.

Add social network friendship features to your Active Record models.

SocialPoster is a gem that allows you easily post to different social networks.