This is simple contact picker with possibility to pick multiple contacts. You can specify at the beginning if all contacts should be checked or not.
Initially I also added search feature - but I disable it due to poor performance. Feel free to fix it - you need to comment only one line of code to turn on this feature.
This project uses ActionBarSherlock - BTW very nice library Link: http://actionbarsherlock.com/
You can freely use this library in all of your projects.