Penny - Penny is a personal finance app that takes the pain out of keeping track of your finances.
WHMCS - WHMCS is an all-in-one client management, billing & support system for online businesses.
Budget Nuts - A simple app to manage your finances
HostBill - HostBill is a powerful and flexible, all-in-one automation, billing, client management and support platform for online businesses.
Spendee - See where your money goes
Blesta - Blesta is professional client management, billing, and support software.