Yubilly - Digital email receipt, invoice wallet and inbox management.
Sortd - Rated the #1 App for Gmail
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!
KanbanMail - A Kanban board for your emails.
Dolphyn Receipt Manager - Smart way to track your receipts
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.