Gwibber - Gwibber is an open source microblogging client for GNOME developed with Python and GTK.
UI Garage - Specific mobile and web design patterns for your inspiration
Choqok - Choqok - KDE Micro-Blogging Client The name comes from an ancient Persian word, means Sparrow!
Muzli - UI/UX and Design Inspiration Chrome Extension
TweetDeck - TweetDeck is your personal browser for staying in touch with what’s happening now.
Design Hunt - Curated design inspiration for everyone