I made a simple 2D drawing library for GUIs a while ago, but recently advanced it a bit more. This place is a quick example of some of the things it has, and it is open source for you to grab and use at your will. Please, however, give credit to me - I don't like having my stuff stolen and not credited, and I don't think you would either. I make it completely free to you, I don't ask for anything but acknowledgement that I made it, simple as that.