Using GrandTotal you can create invoices and estimates in the twinkling of an eye and keep track over the outstanding payments. Detailed statistics and graphs give you an insight into the current state of your business and allow comparison to previous periods.
Soulver is a notepad calculator app for Mac. It's a notepad that gives instant answers to calculations in your text. Soulver is a better way to work things out than a classic calculator, and a more lightweight tool than a spreadsheet.