HelpScout - Help Scout is a simple, straightforward way to provide excellent support
Invenio - Invenio is a free, open-source software to run a digital library or document repository on the web.
HelpNinja - Simple & Affordable help desk
Greenstone Digital Library - Greenstone is a suite of software tools for building and distributing digital library collections...
SupportYourApp - Connecting talented people with the blooming IT industry to help them grow faster by outsourcing support.
Koha - Koha is the first free and open source software library automation package (ILS).