Except all the apps you can download from F-droid, here is some additional ones:

1. 安能饭否

https://github.com/fanfoudroid/fanfoudroid

http://code.google.com/p/fanfoudroid/

2. foursquared (Abandoned)

https://code.google.com/p/foursquared/

3. Beam (Android XMPP)

http://beem-project.com/

4. Replica Island (Game)

Development Blog: http://replicaisland.blogspot.com/

http://code.google.com/p/replicaisland/

Talk link about Android Game …

Android:

Robotium

The most well known one. It’s the Selenium‘s counterpart for Android. The ORBIT tool in my paper was built on this tool.

Calculon

a testing DSL for Google Android, you can specify various kinds of UI attribute’s …