i use these (im in the process of doing the same thing(: )-

2xexplorer - http://www.netez.com/2xExplorer/
metapad - http://www.liquidninja.com/metapad/
imtrans - http://www.paralink.com/ims/
apache - http://httpd.apache.org/
cdex - http://www.cdex.n3.net/
cerberus - http://www.cerberusftp.com/
dev-c++ - http://www.bloodshed.net/
stuffit - http://www.aladdinsys.com/
eudora - http://www.eudora.com/
limewire - http://www.limewire.com/
openoffice.org - http://www.openoffice.org/
opera - http://www.opera.com/
regcmd - http://www.aezay.dk/aezay/regcmd/
trillian - http://www.trillian.cc/
winamp2 - http://classic.winamp.com/
winamp3 - http://www.winamp.com/
x-setup - http://www.xteq.com/
jchessboard - http://jchessboard.sourceforge.net/
pcalc - http://www.analogx.com/
clonecd - http://www.elby.ch/en/products/clone_cd/
the gimp - http://www2.arnes.si/~sopjsimo/gimp/
kazaalite - http://www.kazaalite.tk/
shellonv2 - http://www.dx13.co.uk/shellon/
yahoo messenger - http://messenger.yahoo.com/
bmptoascii - http://www.geocities.com/peter_bone_uk/software.html
cmexted - http://www.geocities.com/revenger_inc/cmext.html
mapochar - http://www.coolwintools.com/freeware.php3
md5summer - http://www.md5summer.org/
netstatlive - http://www.analogx.com/
pickup window - http://www.545studios.com/f/software.php?id=8
procexp - http://www.sysinternals.com/ntw2k/freeware/procexp.shtml
stats2000 - http://members.aol.com/contplus4/stats/
wassociate - http://www.xs4all.nl/~wstudios/Associate/
maxmem - http://www.analogx.com/
avg antivirus - http://www.grisoft.com/
mbm - http://mbm.livewiredev.com/
folding@home - http://folding.stanford.edu/
wisdomsoft screenhunter - http://www.wisdom-soft.com/products/screenhunter.htm
winroll - http://wilpalma.tripod.com/
zone alarm - http://www.zonelabs.com/
daemontools - http://www.daemon-tools.com/ or http://www.cd-rw.org/software/cdr_software/cdr_tools/daemon_tools.cfm
strokeit - http://www.tcbmi.com/strokeit/
amphetadesk - http://www.disobey.com/amphetadesk/
amphetaoutlines - http://www.decafbad.com/twiki/sbin/view/Main/AmphetaOutlines#Downloads
divx - http://www.divx.com/
java - http://java.sun.com/
quicktime - http://www.apple.com/quicktime/download/
parameteriser - http://krapplets.cream.org/parameteriser.shtml
registry explorer - http://www.regxplor.com/
file info - http://www.crashcoursesoftware.com/download/index.html
select all - http://www.crashcoursesoftware.com/download/index.html
power menu - http://www.veridicus.com/tummy/programming/powermenu

be careful with stuffit, the new version seems to get rid of most of the context menu items for some reason

a good amount of these come from shellcity.net