Hi all,
Some of you might heard of it, some of you probably know it or even regularly use it - huggle is a super fast diff browser for MediaWiki intended for dealing with vandalism on Wikimedia projects (but it can be used for any installation), written in C++.
It is being used on a number of wikimedia projects, and it helps to revert hundreds of instances of vandalism every day, you can check this chart for some overview: http://tools.wmflabs.org/huggle/toolstat/daily.php
It may not look like that, but huggle is very effective, compared to twinkle or other tools which are being used by thousands of users, huggle is typically used only by less than ten users daily on english wikipedia, but reverts almost same amount of vandalism as twinkle and such (some days even more). That makes its users hundreds times more effective than users of other tools.
Huggle is currently being developed primarily only by me, Adam Shorland (addshore) and few other devs: https://github.com/huggle/huggle3-qt-lx/graphs/contributors
If anyone of you were interested in helping us, wanted to contribute or just find out more about that, me and Adam will be at Hackaton so don't hesitate to contact us there! Huggle3 is not just all about C++ it contains embedded python interpreter and can be extended with Python and C++/C extensions.