Sirius is a set of development tools (and the accompanying runtime) to enable domain experts to easily create rich modeling environments for their domain. It is written in Java and leverages the Eclipse Modeling stack (based on EMF).
The main web site is at http://www.eclipse.org/sirius. More technical information can be obtained from the wiki at http://wiki.eclipse.org/Sirius.
GitHub tracker and pull requests are currently not supported by the contribution process.
Contributions to Sirius are most welcome. There are many ways to contribute, from entering high quality bug reports, to contributing code or documentation changes. For a complete guide, see the [How to Contribute] 1 page on the team wiki. For further questions about contributing to Sirius, please send a mail to sirius-dev@eclipse.org.