SL4A (Scripting Layer for Android) allowing you to edit and execute scripts and interactive interpreters directly on the Android device. Many parts of the Android API are available, directly from the scripting language.
Scripts can be run interactively in a terminal or associated with an icon and launched like regular apps.
Home page: http://code.google.com/p/android-scripting/
The SL4A User's Guide is a good place to start.
SL4A supports the following languages
- Shell scripts