Love for the Elderly - Send kind letters to elderly folks without family
Bookipi Invoice App - A minimal, beautiful invoice app for freelancers
Letter to Yourself - Send a physical letter to your future self
Billdogg - Beautifully simple invoicing for freelancers
Letterflix - Send letters and snail mail online to the USA, Europe, India, or anywhere in the world. Letterflix is the easiest and secure way to send letters and snail mail anywhere in the world from the comfort of your home.
Invoice.to - A simple & beautiful invoice generator with Stripe & Paypal