Software

    PDF
        Adobe Acrobat Reader
        CutePDF - CutePDF & converter
    Web development
        Broken Link Checker - Xenu
        Web cam - EasyFreeWebCam
        Web development - Nvu
    Mouse scrolling - FreeWheel
    Spyware detector - SpyBot Search and Destroy
    security checking - grc.com
    TV Guide - DigiGuide
    Iomega Ditto & Zip drive software here   

Anti-virus

For DOS you can't beat F-Prot.  For Windows, nobody  is doing better than Grisoft's AVG
AVG products home page www.grisoft.com
Free AVG home page: free.grisoft.com/doc/2/lng/us/tpl/v5 or perhaps free.grisoft.com

K9

POP3 anti-spam software
Home page & download: www.keir.net/k9.html

TightVNC

Remote control software: 'Virtual Network Computer'
Home page: www.tightvnc.com
Download: www.tightvnc.com/download.html

Firefox

The browser that really is better than Internet Explorer.
Firefox - Rediscover the web: www.mozilla.org/products/firefox
Plugins for Firefox: pfs.mozilla.org/plugins
Extensions for Firefox: addons.mozilla.org/extensions/?application=firefox

OpenOffice.org

OpenOffice.org (called "open office") is the open source office software solution that costs nothing.  It is easily more than good enough for almost all Word & Excel users.
Home page: www.openoffice.org

Finding alternative software

The open source as alternative web site gives a list of open source software - but - the difference is you choose the proprietary product and it recommends an open source alternative.
Home page: www.osalt.org

Not yet documented:

Acrobat
ArcExplorer v2
ARJ260X
Army Builder (for WarHammer 40K)
Avery
BGInfo
Broken Link Checker
Character Map Pro
CheatBook
EasyFreeWebCam
FreeWheel
Google Toolbar
HexEd
K9
NetGraphics Optimizer2
NVu
OOo
OOo flowchart symbols
OOO Welsh dictionary
PKZip
ProViewer
PTFB
Spybot
TheJargonFile
Time Stamp
TLC
TreeSize
TweakI
TweakUI
WinZIP
ZTreeWin