Chromed Bird

Chromed Bird is an awesome Twitter client extension for Google Chrome with lots of features.

Some of the most important features are:
* Check trending topics right inside the extension;
* *Experimental* support for real time timeline updates (You need to enable "Use streaming API" on the options page);
* Upload images from inside the extension; (Chrome 8+ and not yet on OS X)
* Change extension's locale from inside the options page;
* Expand the original tweet replies are referring to;
* Follow / Unfollow users by using the inline user actions menu;
* Browse tweets from a specific user directly inside the extension;
* Add and remove timeline tabs "on the fly" using the new right-click context menu;
* Create custom search queries that will update automatically;
* Preview image links by hovering them (Thanks to Takuo Kitame);
* See all your tweets in an unified timeline;
* Follow your timelines (including @mentions, lists, DMs and favorites) and navigate through your tweets;
* Compose, reply, RT, share, favorite and delete tweets;
* Create short URLs within the extension;
* Preview shortened URLs before clicking them;
* Track read / unread tweets;
* Notify user whenever new tweets arrive;