Since I live in France, it only makes sense for me to have a shop organization wall that using French Cleats. I have wanted to do it for years, but just never found the time between house and furniture projects when we were in Seattle.
I ripped down some pine sub-flooring that came from the local French Big Box (Leroy Merlin), cut the edges at a 45, ripped the board in half, and glued/screwed them to a section of 1/2-ish (13mm) plywood. Exterior water-based poly was added to both the back and front before it went up on my clay-block garage shop wall with 8 large anchors. For my first French Cleat accessory: I had three small cut-off sections left from a picture shelf wall I did in my home office that I tacked to section of scrap ply to hold my #5 1/4 Jack, #4 smoother, and a couple of block planes. I keep the rest of my planes in a chest, but I use these constantly and wanted to have them in reach. I was so happy with how it all tuned out that I started building all sort of other holders and organizers: ones for squares, chisel rolls, Mallets, cords, apron hooks, saw horses, clamps, Japanese saws, etc… I ringed the garage with a single cleat about 6′ up for all sorts of diabolical organization plans, then hung two more above the lathe so that I would have a place to suspend my lathe chisel rack that is currently in progress and for a spot light that shines down on projects as they are turning.
I will update and post as I add new stuff.