neo.tax - automated R&D tax credits for startups = extra month of burn
Mattermark Daily - A curated newsletter of blog posts from investors & founders
Stripe Atlas Taxes - Help file your business taxes
Startup Quote - Awesome founders provide wisdom about making things
Quarterly Tax Calculator for Freelancers - See how much you owe to state and federal in 7 sec
Snapstorms - An archive of advice from Mark Suster on Snapchat