Free Invoice Generator - A free invoice generator for startups
TypingDNA Authenticator - 2FA codes in your browser, secured by the way you type
Ramp Receipts - Create a receipts/invoice dashboard for Stripe
Cotter - One-click phone number login and checkout
Envoice - Send invoices and get paid on Paypal, Payoneer, Stripe and Square.
Auth0 - Auth0 is a program for people to get authentication and authorization services for their own business use.