I made this tool holder for my college dorm room. It uses command strips to hang to the wall. Each segment is its own module and can be swapped for what ever you need it for. I recommend no more than 5 segments in between each connector. It's pretty useful if you can't drill anything into the walls but still want to store your tools.
To use just put a command strip in the grove on the back of the connector and stick it to the wall. Be careful when you remove them, I found out the hard way that these stripes can pull off wall paper if just try and rip them off, but if your care full you should be fine. After that all the modulus should just slide together and rest between two or more connectors.
I included all of the modules that I've made so far and I'll add more as I come up with them. I put the f3d of the basic holder it you want to make your own module.
The black connector pieces that are holding the blue modulus are all old prototypes. The final design for the connectors are the black pieces used with the white modulus. Just in case anyone was confused by the fact all the connectors in that picture are different, I'll post better pictures when I make a new set.
Here's a link to the command strips I used https://www.amazon.com/gp/product/B0751S46TS/ref=oh_aui_search_detailpage?ie=UTF8&psc=1