Virtualmin - It includes numerous features not in the GPL version (like script installers, resellers, HTML editor, an improved UI, mobile access, spam and virus filtering).
Google App Engine - A powerful platform to build web and mobile apps that scale automatically.
Avogadro - Avogadro is a free, fantastically easy to use molecule editor.
Dokku - Docker powered mini-Heroku in around 100 lines of Bash
Jmol - Jmol is a free, open source molecule viewer for students, educators, and researchers in chemistry...
Google Cloud Functions - A serverless platform for building event-based microservices.