DB3 is open-source, unless I'm going crazy, and there are instructions on the wiki as to exactly what you need to do to get it, and Microsoft Visual C# 2008 Express Edition (also free) up and running (or at least as close to running as it gets right now).
I had never even seen a single line of C# before I joined Nums in the project, so if you want to try to help out, it is not only OK, but would actually be very appreciated.
If you do decide you want to get it up and running, Nums and I can both assist you in the setup, so just PM us if you need help (I check the forum quite often, so I will likely reply within an hour at the most, unless I'm asleep). It is no trouble at all if you need to be brought up to speed.
If, while getting set up, you notice something confusing on the wiki, feel free to fix it.