Yubilly - Digital email receipt, invoice wallet and inbox management.
Polymail - Native email app for email productivity.
ExpenseBot - ExpenseBot takes the hassle out of expense reporting with our intuitive interface and powerful integrations. Your employees will love us, and so will you!
Airmail - Airmail is a lightweight and lightning fast mail client for Mac.
Dolphyn Receipt Manager - Smart way to track your receipts
Morning Mail - A new way to manage your mail. Tinder for email.