TweetMute is a project mainly written in JavaScript, based on the GPL-3.0 license.
Chrome extension to mute annoying users.
Mute Twitter users easily without unfollowing them.
Install the extension from here. To mute an user, add his or her name to the list. You can also block retweets, if you will.
In case you want to package the extension by yourself.
Currently, TweetMute is for Chrome only (5.0 and higher).
Raphael
All code is published under GPLv3