The distribution package can be downloaded from the Sourceforge dowload section.
The Maven artifacts are deployed to the Maven's central repository
<groupId>org.st-js</groupId>
<artifactId>js-lib</artifactId>
<version>${stjs.version}</version>
The source code is on github: https://github.com/st-js/st-js.
If you feel you can help us improve our project don't hesitate to propose your contributions on github! We'll be more than happy to include them and share them with the project's users.