Arbit aims to provide a decent modern extensible multi project tracking tool. Features start with issue tracking and wiki and do not stop before code analysis and translation management.
You can always get free support for Arbit like in every other Open Source project. Check out the Participate section for details on ways to get in touch with the developers.
Another way to get support is by using the issue tracker for Arbit.
There are also companies providing commercial support for Arbit:
Qafoo GmbH - passion for software quality
Founded by the lead developers of Arbit, Qafoo provides support for Arbit and general consulting and training on software quality tools and processes.