neo.tax - automated R&D tax credits for startups = extra month of burn
Receiptful - Receipts that increase CLTV. Exclusive (early access to PH)
Stripe Atlas Taxes - Help file your business taxes
QuickReceipts - A mobile app that automatically tracks, organizes, and stores your digital receipts privately on your device.
1099 Tax Forms by Payable - Automatically generate tax forms for contractors
Keep Your Friends Close - A free e-book about maximizing Customer Lifetime Value