PeerGuardian for Windows

PeerGuardian 2's program code is open source, which means that it is freely available online to anyone who needs it. This allows you to modify the code and even branch into your own project. It also encourages peer review which ensures that bugs are quickly fixed. PeerGuardian 2, which is Open Source, means that there are no backdoors and spyware.

The original authors have stopped developing this title, but a new team called PeerBlock has continued development.