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
HippityPip - Teach phone numbers to kids
TL;DR Email - Send short emails & read emails as fast as you read Facebook
Allowcation - Simple allowance and financial allocation tracking for kids
mlist - Email newsletters, outside of the inbox
Battle of the Brands - Compare the online awareness of 2 brands in a battle