Solo - Personal kanban boards hosted on your own server

Respiray - Wearable air purifier that kills viruses with UV technology

Cash App - The easy way to send, spend, bank, and invest.

iLend - Keep track of the things you lend and borrow.

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.

Everfest - A global calendar and search engine for festivals