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

RetailMenot - The RetailMeNot mobile app allows you to find deals on the go for both online shopping and in store shopping.

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.

Slickdeals.net - Slickdeals: The Best Deals, Coupons & Discounts on everything

Solo - Personal kanban boards hosted on your own server

Groupon - Each day Groupon offers a deal through local vendors in your city.