Wren - Offset your carbon footprint by saving rainforests
Google App Engine - A powerful platform to build web and mobile apps that scale automatically.
Klima - Go carbon neutral
Dokku - Docker powered mini-Heroku in around 100 lines of Bash
Capture - A great free screen capture utility that allows you to capture either a window or the desktop and save it to either a file or the clipboard.
Google Cloud Functions - A serverless platform for building event-based microservices.