Raspberry Control - Control Raspberry Pi with your Android Device.
secure connection via SSH,
easy control and monitoring GPIO,
monitor and graph temperatures remotely using DS18B20,
remote terminal emulator,
remote process management,
built-in MJPEG stream client,
easy 1-wire and I2C bus management,
Raspberry Control soon available in Google Play (Android app) and Pi Store (Raspberry Pi app).
Note: Their author just told me that this app will be available in this weekend (Google Play) :D