YouWeb - The first social network focused on your way to experience the Web and interact with virtual...
Frost for Facebook - Frost is a third party Facebook wrapper geared towards design and functionality
ColdCast - An open social network with zero corporate interference.
Face Slim - Web App for Facebook. Lightweight, ad-free, chat support and modern look.
Identi.ca - Social & Communications
Facebook Lite - Facebook Lite is a light and small size app that contains all the classic features of the Facebook app such as timeline, liking or commenting on photos and other such simple features.