DSpace - DSpace open source software enables open sharing of content that spans organizations, continents...
Anima App - Design, get feedback, convert to code, publish, iterate.
TinyCat - The online catalog and integrated library system for tiny libraries, powered by LibraryThing.
Sketch Repo - Collection of resources for anyone who uses Sketch
Invenio - Invenio is a free, open-source software to run a digital library or document repository on the web.
Auto-Layout for Sketch - Responsive design for Sketch