Miniature Mail - Little letters printed on demand and sent in tiny envelopes.
Muglaunch.com - Design and sell print on demand products easily @ Muglaunch
VSUAL - A new high-end print on demand marketplace for artists.
Customily - Design, sell and print personalized products the smart way
Printful for Messenger - Create and sell print-on-demand merchandise with Messenger
Voodoo Manufacturing - Fast, affordable, high-volume 3D printing