Windows Live Sky Drive
Survey Monkey
c-cleaner (reg fixes, disk cleanup)
Spybot search & destroy
adaware
hijack this
Firefox web developer extension
irfanview (graphic viewer, etc.)
rockyou.com (sideshows)
slide.com (slideshows)
Slideshare.net
OpenOffice (includes presentation software)
Kansas Libraries on the Web (wordpress sites for libraries) mykansaslibrary.org
Audacity
ListGarden
SnagIt
Firefox extension for screenshots
PC Mag article: 157 best free tools
Google Calendar
Google Calendar Sync
Zoho (has web forms function)
Cybera - open source time management for computers
Password safe
1password
libstats (reference stats)
meebome - reference / in opac
Vista sidebar widgets - Yahoo Widgets for XP
Google Notebook
Personal Ancestral File - Familysearch.org
Geni.com
OpenSourceMac.org
lifehacker.com
Koha / Evergreen
vizu.com (poll widget)
LibraryElf
libX browser tolbar
widgetbox
ScreenHunter 5 Free (screen capture tool)
Spam Gourmet (throw-away email addresses)