Huggle

Huggle is a fast diff browser application intended for dealing with vandalism or other unconstructive edits on Wikimedia projects, written in C++.

The principal idea of Huggle as anti-vandalism software is to make it possible for Wikipedia to stay as open and free as possible (everyone can edit, without any restrictions), while keeping it clean of any vandalism, edits made either by malicious robots or bad-faith edits made by people.