Stripe Atlas Taxes - Help file your business taxes
Transferslot - Easily buy and sell side-projects
Taxfyle - Stop doing your taxes, leave it to the professionals.
MicroAcquire - A free & anonymous startup acquisition marketplace
neo.tax - automated R&D tax credits for startups = extra month of burn
BitsForDigits - An acquisition marketplace for profitable internet businesses. We make it anonymous & free for owners of $100K+ revenue startups to attract full & partial acquisition offers. Free for acquirers to join for a limited time. No commissions, ever.