Face Slim - Web App for Facebook. Lightweight, ad-free, chat support and modern look.
ZeroMe - Social network for the distributed P2P network ZeroNet.
Tinfoil for Facebook - Download Tinfoil for Facebook app for Android. Tinfoil for Facebook is for those users that require a Tinfoil hat. .
GNU social - GNU social is communication software for both public and private communications.
Frost for Facebook - Frost is a third party Facebook wrapper geared towards design and functionality
Pleroma - Pleroma is a free, federated social networking server built on open protocols.