Good Gear Guide
Android apps: 9 best, free social networking choic...
What makes the AppBrain App Market, a mobile software shop for Android, special? It recommends applications based on the apps already installed on your device, along with new or popular apps. And that's not all. The best part about AppBrain is that you can connect your Twitter and Facebook accounts to locate friends and connections who also use AppBrain, and then access lists of your friends' favorite Android applications.
Android apps: 9 best, free social networking choices