My suggestions:
ZoneAlarm - everyone should know that this is one of the better free firewalls on the net. If you like a little more techno - access, perhaps
Tiny Personal Firewall
Free virus protection from
grisoft.com, AVG Anti-virus, a full virus protection suite for free.
To kill advertising spyware that may be hiding on your system, checking up on your surfing :
Adaware
WipeUrTrax, an internet privacy utility (not free, but a free trial)
To kill those pesky popup windows,
Akiller
Like many computer users, some of us gather a pretty large movie library, this utility keeps it all in order :
movie catalogue
Increase your download speed with
Metaproducts download express
A system tweaker called
xteq X-setup that allows you to adjust your system for higher speed.
A whole suite of "advanced" system tools at
G-lock software
Weird 3-D clocks, at
clock domain (NB - I don't use these!), or the one I used originally, which I found here at
World Time