I created this customizable stand to display my old handheld game consoles neatly on my shelf, but it can be used to prop up any object which is relatively rectangular on top of any flat surface.

It can be given arbitrary widths, thicknesses, and angles (how far you want the object to lean back). Its center of gravity can be tweaked by adjusting how far back and how far up the stand portion on the back goes.

You can print one big wide stand to hold the entire base of your object if your printer's build area will accommodate it, or you can print multiple smaller ones to cradle your object at multiple points.

Click on 'Open In Customizer' to tailor the stand to your requirements.

Github: https://github.com/dbenoy/3dprint-stand

Toss me a tip if you'd like me to keep making more open source objects.

[Update: Now you can add sides to the stand to rest against the edge of the object.]