I've tried a few - ModManFX, MSFS Addons Linker and MSFS Mod Manager. For me its down to Addons Linker and MSFS Mod Manager.
I like Addons Linker for the fact that it creates links to the addons rather than copy them into the Community folder. You can place the actual mods in a separate folder and then organize your addons in separate folders. So when you disable a mod, there's no need to move files around. It simply removes the link in the Community folder. This cuts down on solid state drive wear. Another cool benefit - you can organize your addons into folders and you'll see them listed this way in Addons Linker. But the developer chose to use stars to represent folders rather than an actual folder so that's a small usability thing. Once you know, you're good. However, there's an annoying error that pops up on a folder settings screen which you can continue past and ignore. Could be me but I haven't explored it further.
Link - https://flightsim.to/file/1572/msfs-addons-linker
MSFS Mod Manager just works. Its quick and it looks great especially with the MSFS skin applied. It uses the Community folder to enable addons unlike Addons Linker. When you disable an addon, it moves them into a disabled folder. If you're concerned about solid state drive wear then this is a negative. Because it uses the Community folder to manage addons, there's no folder organization which does mean a cleaner interface. I suppose the lack of organization could be a concern for those with tons of addons but I'm not there yet. Oh and the developer is considering the use of links similar to Addons Linker so that moving files between places isn't needed.
Link - https://github.com/NathanVaughn/msfs-mod-manager
Right now, I'm leaning toward MSFS Mod Manager but either will serve you well.
