Free Windows addons and utilities

I've spent much of my time the last few years looking at windows support from the linux side of the fence. Certainly linux boot disks and the like are among the most useful utilities that I've used. However, I am reminded from time to time that there is a good share of freely available utilities on the Windows side of things. http://www.mdgx.com/ is a site devoted to not just the free windows and dos utilites and add ons... but to quote the site...

Or enjoy browsing OFFline my entire FREEware collections containing tons of Valuable, Original, UNconventional, UNique, UNofficial, UNdocumented, UNcommon, UNknown, UNdiscovered, UNheard of + Hidden PC, Laptop, Modems, AOL, MS Internet Explorer + Netscape/Mozilla MS Windows 2003, XP, ME, 2000, NT 4.0, 98/98 SE, 95B/95C OSR 2.x, 95a OSR1, 95 + 3.1x and MS-DOS 8.00, 7.xx + 6.xx ©TRICKs, SECRETs, TWEAKs, TIPs, HINTs, FIXes, HACKs, GUIDEs, SPEED-UPs, TUNE-UPs, WORKarounds, SETUPs, CONFIGs, NEWs, INFO, SPECs, References, UPGRADEs, PATCHes, Easter EGGs + LINKs, LOGOs, ICOns + BitMaPs, REGistry + BATch files, ALL dedicated to SPEED-UP + MAXIMIZE your computing performance and to help you find possible SOLUTIONS for your "Wintel" problems , in 2 "flavors":

So, if you're looking for hidden undocumented switches for dos utilities you just might find it here amongst all the other good stuff. Nice resource (Yes, I'm adding it as a link on the sidebar.)