There have been quite a few discussions of "eQMS" systems on this site. I'm sure a search will turn up plenty. Just off the top of my head, I can think of ETQ, QCBD, Q-Pulse, MasterControl, Arena, and BPA. (Please do not take that as an endorsement of any of those; just tossing out what I've been exposed to).
I don't know of any such system that incorporate a code repository (and presumably change management). To that end, I know of systems such as SVN, Github, and Bitbucket that seem to be popular.
I think there are some that do requirements tracing but that's kind of a niche tool. (DOORS is very powerful but the overhead involved is challenging for many.)
I don't know of any that support risk analysis activities. I think many use Excel spreadsheets for the bulk of the work (again, a search on this site should turn up some). The eQMS systems will, of course, handle any document control aspect.
Bear in mind that an investment in such tools is not a 'silver bullet.' As you assess tools, be sure to know what your requirements / needs are and how the tools fit. There will likely be a more-than-nominal investment on your part for setup and maintenance. Understand what that overhead is before jumping in. I've seen a lot of good tools maligned because they weren't appropriate, weren't set up properly, and/or weren't being used properly.
