Visit SourceForge Project Page for downloads or RELAX home page for information about RELAX Core.
If you are looking for RELAX NG information, check out the RELAX NG project at SourceForge.
The ISO RELAX project is started to host the public interfaces useful for applications to support RELAX Core. But nowadays some of the stuff we have is schema language neutral. All the source code and binaries are available under the MIT license (see inside the distribution jar file for details.)