The Freelance Rate Calculator - Get your minimum viable freelance rate
Stripe Atlas Taxes - Help file your business taxes
LanceID - Show and share your current and upcoming availability as a freelancer with your own status page.
Taxfyle - Stop doing your taxes, leave it to the professionals.
Freelancer Stack - Curated directory of tools used by 10,000+ freelancers
neo.tax - automated R&D tax credits for startups = extra month of burn