Empathize - Manage your credit cards & loan in 1 place
TL;DR Email - Send short emails & read emails as fast as you read Facebook
Inbox Creature - A super cute virtual pet, delivered right to your inbox.
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
Relief - The free app that gets rid of your credit card debt
mlist - Email newsletters, outside of the inbox