The Simple Postcard - Text a photo to mail it as a postcard
MailtoUI.js - Enhance your mailto links with a convenient user interface.
Mailjoy - Delightfully easy direct mail marketing. A DIY direct mail tool created for marketing and growth teams. Design, mail & track personalized direct mail postcards and letters. Digital marketers use Mailjoy to send data-driven mail campaigns.
I hate mailto - Stop websites from opening your email client.
NanaGram - Text your photos and we'll mail 4x6 prints to your Nana.
Send Mail Get Mail - A postcard-sending website.