Partition Managers:
Partition Resizer - http://zeleps.com/
Ranish Partition Manager - http://www.ranish.com/part/
SwissKnife - http://www.compuapps.com/Download/swissknife/swissknife.htm
TestDisk - http://www.cgsecurity.org/index.html?testdisk.html

System Information and monitoring:
AIDA32 - http://www.sofotex.com/AIDA32-download_L9326.html
ATITool - http://www.techpowerup.com/atitool/
ATI Tray Tools - http://www.guru3d.com/article/atitraytools/189/
CPU-Z - http://www.cpuid.com/cpuz.php
Everest - http://www.aplusfreeware.com/categories/util/optdiag.html
Gkrellm - http://bill.nalens.com/
K1 - http://clanpkm.free.fr/K1/?lng=en
Motherboard monitor - http://www.majorgeeks.com/download.php?det=311
SpeedFan - http://www.almico.com/speedfan.php
Sysmetrix - http://www.xymantix.com
WCPUID - http://hp.vector.co.jp/authors/VA002374/src/download.html
WhatsRunning - http://www.whatsrunning.net/whatsrunning/main.aspx