We made https://mailprincess.com https://mailprincess.com a while back too. and http://maleprincess.com http://maleprincess.com too It lets you send letters, p

We made https://mailprincess.com https://mailprincess.com a while back too. and http://maleprincess.com http://maleprincess.com too It lets you send letters, postcards, checks and faxes Wound up having a decent number of users at some point, but then people started abusing the check sending features. We took it down and built some anti-fraud stuff, but never did anything to acquire users again. It does continue to work perfectly well though. It's interesting that so many products like these exist in spaces that will probably never be huge and so there's no major VC funded player that may kill them all.