http://code.google.com/p/ad-away/

AdAway is an open source ad blocker for Android.

License: GPLv3+

Developer: Dominik Schürmann

Libraries

ActionBarSherlock (Apache License v2)
RootTools (GPL v2)
Mongoose Webserver (MIT License)
Tcpdump/Libpcap (BSD 3-Clause License)
• Code from Airpush-Detector (Apache License v2)
CommonsWare WakefulIntentService (Apache License v2)
• Dropbox Emblems Tango by Charles A. (Creative Commons Attribution 3.0 Unported)
• Download Fail Icon from Faenza Icons (GPLv3)