VBGamer

I downloaded the VB versions of their SDK (about 20 MB), I tried to install it but it asked me for a serial number. After going back to the website, I found the "free serial" number link. I had to give an email address so the serial number could be sent to me. Overall there is a lot of information and a quite a few samples. Some of them are very nice, but they all had the text "Student License. Comercial use is illegal" over everything. To actually use this software you'll have to pay a minimum of $400 to get a license.