GFeedLine is a social networking client. It supports Twitter, Facebook, and Tumblr.
GPhotoFrame is a photo frame gadget. It shows pictures on the desktop from multiple sources: local folders, F-Spot databases, Shotwell databases, Facebook API, Flickr API, Picasa Web Album API, Tumblr API, and RSS.
Twitim is a Twitter client for GNOME. It features
XMPP connections, custom watchlists, sounds, and
A program to generate Morse code sound files from text.
A multiplatform Facebook client based on the idea of bringing emoji to the desktop.