SL4A brings scripting languages to Android by allowing you to edit and execute scripts and interactive interpreters directly on the Android device. These scripts have access to many of the APIs available to full-fledged Android applications, but with a greatly simplified interface that makes it easy to get things done.
SL4A is designed for developers and is alpha quality software.
Even though a lot of contributors are working for Google, this is not an official Google product.
SL4A is no longer under active development. However, some forks of this project may be.
The original Google Code wiki has been converted to Markdown and is available in the wiki branch. A few of the most important pages are: