Plant - Version control app and plugin for Sketch
DSpace - DSpace open source software enables open sharing of content that spans organizations, continents...
Kactus - Design version control without changing your tools
Invenio - Invenio is a free, open-source software to run a digital library or document repository on the web.
Abstract - A secure, version-controlled hub for your design files
Evergreen ILS - Evergreen - Open Source Library Software