This is a great website for android stuff : http://www.downloads-android.com
you can :
1. download stuff (games,
software, rings, etc.)
2. upload stuff (same as above)
3. join forums and discuss issues related to Android.
If you are a software developer, you are most welcome to upload the software you wrote.
The website includes many categories for software, but if you are missing a category you may also emal the administrator, and they'll be happy to create the relevant category for you.
Enjoy...