Models
Horizontal 3D Printable Models. Makeshape.co have 3 Horizontal 3D Printable Models.
Standing Build Plate Holder 4 plates
Makerworld
AngryPearl
Free
IKEA Skadis Connector (horizontal)
Makerworld
AU3D
Free
Modular Storage System
Makerworld
How2Texan
Free