Inquisimunda is a modded version of Necromunda that allows players to make Inquisition Cells, Chaos Covens, Xenos Kill Teams and loads more stuff as well as being able to take the original gangs from Necromunda. It has a few more changes to the Necromunda rules, some things that are rather cool, and an expanded Armoury Section from the original game.
If you're interested, Resources with pdf's for the rules, etc can be found here -
http://empireofghosts.blogspot.com/p/inquisimunda-resources.html
And there's a forum, though it moves rather slowly dedicated to the game here -
http://inquisimunda.proboards.com/
I like it cos I liked the Necromunda rules and this just expands and allows me to use my other
40K stuff too.