A basic port knocker client for Android. Similar to the other port knocker apps but with an ICS style and more intuitive interface. Also includes a widget and the ability to choose an application to launch after knocking. The (relatively) larger size is due to the dependency on the ActionBarSherlock library.
Please don't hesitate to contact me if you encounter any bugs, or even if you just have suggestions.
The code is open source and can be found at: https://github.com/xargsgrep/PortKnocker
Removed hostname/IP validation since it was causing problems on a few devices
Fixed crashes in Jelly Bean when adding port by updating ActionBarSherlock to 4.1.0
Allow knocking to port 0