Rainbow Pencils - Make rainbows whenever you sharpen.
Cash App - The easy way to send, spend, bank, and invest.
Sans Forgetica - Scientifically designed font to help remember study notes
Solo - Personal kanban boards hosted on your own server
WingNotes - The most productive way to take study notes
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.