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.
SendLetters - Send Documents, Invoices, Letters physically to anywhere in the worldHave Documents Printed, Folded and Mailed by us, starting at $1
DocuPost - Sustainably mail letters, checks & postcards online from 75¢
Shortwave Snail Mail - The world is going too fast, and not everything should be an emailWhy not take the time and write a postcard, like in the old days but using modern tech?Shortwave Snail Mail sends a stylish postcard via regular mail for you.
Letter to Yourself - Send a physical letter to your future self
Obsidian.net - Obsidian is an Action-Adventure, First-person Exploration, Puzzle and Single-player video game created and published by Rocket Science.