Gwibber - Gwibber is an open source microblogging client for GNOME developed with Python and GTK.
Daisy - Get help creating healthier and more productive habits
TweetDeck - TweetDeck is your personal browser for staying in touch with what’s happening now.
Mosca - Mosca is the quality and technology leader when it comes to developing and manufacturing high-quality strapping machines, strapping and transport securing systems.
Tweetbot - Sync your timeline across your iPhone, iPad, and Mac. Mute tweets by user, hashtag, tweet source, or keywords (including regex). 3rd Party support for image, video, read later, and timeline sync services.
Embold.io - Peer Code Review