Felt for iPhone - Handwritten cards for the modern world
Send Mail Get Mail - A postcard-sending website.
43 Layers - Marketplace for custom gifts and decorations
The Simple Postcard - Text a photo to mail it as a postcard
GiftStarter - Crowdfunded gift-giving and gift concierge
NanaGram - Text your photos and we'll mail 4x6 prints to your Nana.