The path to free adobe software is in GenP, here have a guide (it's got other patching methods).
Otherwise most download websites like 4download have "Portable" versions that you just extract and run. I find the site appnee.com is good for those. (but i do find portable ones are often slower maybe it was just me).
You are correct most often precracked just need to be installed, look for the download page for instructions if there's no readme. Patches are often .exe's that you run and cracks are files you can drag and drop into the installation folder (there are exceptions of course)
The Trove was a site where you could get a shitload of ttrpg content. But it got dmca'd and now only exists (afaik) as a torrent file.