Send Mail Get Mail
A postcard-sending website.
Send Mail Get Mail is a fun way to enrich communication between humans by slowing it down. No profile/accounts as of now; it's just a simple form which sends a physical postcard anywhere in the U.S. in 4-6 business days.
Mostly, I did this to play with some neat technologies. The whole thing is put together Lob, Gravity Forms, Stripe and Zapier!