Buzzbird
Buzzbird is a totally free (as in beer and freedom) Twitter client based on Mozilla's XUL platform. There are no advertisements, and it is completely open-source.
Features Multiple Account Support Desktop notifications Service filtering Conversation views Selective filter views (can choose Timeline, @mentions, direct mentions) Retweet, Reply, Unfollow, and Favorite button on each Tweet Built-in URL Shortening (currently via is.gd) Menu to insert emoji in tweets Read/Unread count in status bar Click on a users avatar to see more information about them, or to follow/unfollow them.
