Grove - Personalized financial planning for everyone
EmailTracker.cc - Free Email Tracker for Gmail. Close More Deals with Comprehensive Email Tracking, Automated Follow-up Reminders, and Detailed Click Insights
Betterment - We manage your investments so you don't have to.
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
Inbox Creature - A super cute virtual pet, delivered right to your inbox.
MailTime - Go through your email as fast and easy as text-messaging