neo.tax - automated R&D tax credits for startups = extra month of burn
Harpoon Revenue Goal Calculator - Freelancers, how much money do you need to make?
Stripe Atlas Taxes - Help file your business taxes
Hourly Rate Calculator - Find out your ideal hourly rate
1099 Tax Forms by Payable - Automatically generate tax forms for contractors
BillFront - Access your app revenue in a fraction of the usual time