Zeplin - Collaboration app for UI designers & frontend developers
Invenio - Invenio is a free, open-source software to run a digital library or document repository on the web.
Mightytext - Send & Receive SMS Text Messages from your computer. Sync'd with your Android #
Greenstone Digital Library - Greenstone is a suite of software tools for building and distributing digital library collections...
ActiveWords - Auto correct on steroids
Koha - Koha is the first free and open source software library automation package (ILS).