Cryptgeon - Securely share self-destructing notes

Solo - Personal kanban boards hosted on your own server

BURN.link - Send secure, encrypted, self-destructing messages

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

Burner Note - Burner Note is a free, ad-free and open sourced service for sending secure text based notes that are completely erased from existence once they've been read.

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.