Rainmaker - Rainmaker allows you to make your Google Contacts better.
Untools - Hand-picked tools for better thinking
Stripe - Online payment processing for internet businesses. Stripe is a suite of payment APIs that powers commerce for online businesses of all sizes. Use Stripe’s payment platform to accept and process payments online for easy-to-use commerce solutions.
Super Thinking - The big book of mental models
dip - accountability groups for developers
Mental Models - Thinking tools to help you navigate life better