The following list is of working resources for the UT3 engine. There are tons of links out there, but these are ones I have used and look at for reference.

Below is a list of programs you might want to download. The reason for this is money...if you use...let's say 3DS Max to make a game, but you did not buy 3DS Max, you downloaded it illegally, and then you made the best game ever and made millions of dollars...sooner or later someone would find out and tell Autodesk about it and sue you for illegally using their programs. After that, no one would hire you again.