I use an improvised plywood panel to hold my networking kit in the middle of the house, where it is not convenient to have a shelf or to take up much space. The panel has a power strip at the bottom to which all the devices connect.

But for this to stand on its own, I develop this simple pair of brackets, which I initially inclined at 80 degrees. It's fine for most cases, but with my Unifi UDR at the top, the weight at the front was too much to hold the panel, so I adjusted the design to get 75 and 70 degree versions.

The brackets are very simple, with 2 screw holes for 4/5mm wood screws. The bottom screw is applied via a slot on the bracket to permit direct access with a screwdriver (a long'ish one). But this slot could be skipped in favour of a ratchet with a pozi bit.

It's unlikely that anyone has the same use case. But... there's plenty of situations where it may be useful to have a way to stand a panel upright, so I am sharing the freecad parametric model to facilitate modifications.

Printing is dead easy - I used PLA because really it is good enough. 0.20mm layer height, 4 perimeters and 25% cubic infill is plenty strong for what I needed. I used organic supports for the screw slot.