No specific info about version 3.5. Please visit the main page of Billings on Mac Informer.
TurboTax Deluxe 2012 is an app that allows you to maximize your tax deductions.
This app helps you keep track of the time you spend working on projects.
In-Mobility is a cloud based customer relationship management application.
Photo business management for tracking billings and profits.
MacPractice 20/20 is a medical application for Mac.