neo.tax - automated R&D tax credits for startups = extra month of burn
1099 Tax Forms by Payable - Automatically generate tax forms for contractors
Stripe Atlas Taxes - Help file your business taxes
Taxfyle - Stop doing your taxes, leave it to the professionals.
Social Media Pricing Calculator - Planable, along with pricing experts from Soft Fight, built the pricing calculator that agencies & freelancers need.
DocSpring - DocSpring provides a PDF filling API that makes it easy for programmers to fill out and generate PDF documents.