I'm looking for some other open source games out there that I can port (easily or not) to Android. I know that it's possible to port Wolfenstein and Doom and was wondering if there are any others out there. I was thinking of Civilization (I remember a linux port some time back) and a few others. It can be in C/C++ or Java. Thanks in advance.
Your best bet is probably cube. It uses the zlib license. It's been ported to pretty small platforms so running on an android device isn't out of the question.