The DITA Community Github organization serves the DITA community by providing a place for things like Open Toolkit plugins, sample content, or other utilities that don't have a better home. See the main Github DITA Community page for the list of projects. Each project should have a readme file and may have its own project Web page or wiki.
If you would like to contribute a project to the DITA Community activity, contact any of the people listed as owners of the DITA Community Github organization.
The DITA Community projects are mostly DITA Open Toolkit plugins of various sorts. Some of the more interesting include:
Organizes all the DITA Community plugins together as git submodules. Useful for working with all the plugins together. Also provides release packages with all the plugins.
Simple PDF2 extension to format definition lists as defintion lists using fo:block, not as tables.
Provides extensions to the base Open Toolkit preprocess tool chain.
Open Toolkit plugins for the DITA learning and learing2 domains. For use with the 1.x Open Toolkit
Basic support XSLT libraries useful for any XSLT transform: relpath_utils.xsl and dita-support-lib.xsl. Intended for use with the DITA Open Toolkit but not limited to that use.
Random utilities for doing little things with DITA, such as bursting multi-topic documents into individual topics, XQuery stuff, etc.
Related or interesting projects projects include: