Google Fit SDK - Google Fit is an open ecosystem that makes it easy to store, access, and manage fitness data.

Spark Mail - Spark helps you take your inbox under control. Instantly see what’s important and quickly clean up the rest. Spark for Teams allows you to create, discuss, and share email with your colleagues

Accountable - Accountable is a platform designed to help organizations manage HIPAA compliance.

mlist - Email newsletters, outside of the inbox

Lua - Powerful, fast, lightweight, embeddable scripting language

TL;DR Email - Send short emails & read emails as fast as you read Facebook