Ummm, hard disagree. Let's say you bought a new cordless drill and want to store it neatly. Go to one of those sites: printables, thangs, thingiverse, makerworld, cults3d, myminifactory, yeggi, grabcad, cgtrader (and there's more), enter your drill model and marvel at sixty different designs for a wall mount people created and shared for free. Pick one and print it.

If you need custom stuff, try tinkercad, it's more like playing with lego than actual CAD but you can do a lot of cool stuff with it.