If you are looking for applications software that are capable of running on T-Mobile G1 Android phone, I have a resource that provides free download for T-Mobile G1 Android phone. PhotoLoad Android offers free games and software start from Internet applications such as Twitli, Minesweeper, ToDo List, to the software dictionary for your Android mobile phone.

And also, if you want to develop software for mobile phone, you can join in there as part of the community developers.