Someday I hope to make available a serious list of links and also a list of excellent freeware, but for now here is just an article about a great free system tool I started using recently.

Windows 2000/XP::Defragment Page File

Windows 2000 includes a basic disk defragmentation tool for NTFS that was sorely missing from NT and I use it regularly.
One thing I hate is seeing that the system files remain fragmented.
SysInternals has an extraordinary selection of free utilities for Windows 2000:
http://www.sysinternals.com/ntw2k/utilities.shtml
One of them is PageDefrag v2.20 http://www.sysinternals.com/ntw2k/freeware/pagedefrag.shtml
When you boot W2K it defragments system files including the page file.

http://www.sysinternals.com has a great list of freeware system tools for Windows 9x - XP. Just browsing there briefly I found a number of items I wanted to try out.