This app was briefly discussed in this
thread, towards the end somewhere.
It's basically an app to make Windows 7 explorer folder windows remember their size and position. It has a couple of additional features too, and hopefully some more later on. It does NOT manage window size/positions of regular applications, if you want that, other apps like Window Manager do it. Allthough I haven't tried it, in theory it should work to run Window Manager simultaneously, if it's configured to ignore folder windows (found as "CabinetWClass"). I'd strongly recommend configuring WM to ignore them, or disable WM, before running ShellFolderFix, to avoid any potential "fighting" between the two apps.
Important to note is that this is the first public test release, so there may be bugs and issues when running on a wider variety of systems. On that note it might be a good idea to try it a little while first before enabling the auto-start feature, just to make sure it basic functionality works as intended.
Even more important to note is that the 32-bit version is completely untested, as I don't have any 32-bit install at hand. Reports on how it behaves would be welcome.
Packages available are non-installer versions (zipped) and a unified installer that should work on both 32- and 64-bit systems. When using the installer to upgrade from a previous version, it's good practice to exit any currently running ShellFolderFix before starting the installer, to reduce chances of needing a reboot.
Current release 1.0.2: