Delabs Electronics freeware page
http://delabs.tripod.com/fware/freeware.html
Single page of greenware, including some gems. Winpiano and DoToo.

Dirk Loss: Windows-Tools on CD-ROM
http://www.dirk-loss.de/win-tools.htm

kikizas.net
http://www.kikizas.net/en/usbapps.html#list
Single (long) page categorized. Very good descriptions

nedwolf - Best Free Portable Software for Windows
http://nedwolf.com/Freeware-Portable.htm

Portable Freeware
http://www.portablefreeware.com/
It's big, it's well maintained, it's easy to navigate. A great "first stop" when looking for no install greenware.

portableapps.com
http://portableapps.com/

Portable USB Drive Apps
http://kk.hopto.org:8080/wiki/index.php/Portable_USB_Drive_Apps

Pricelessware
http://www.pricelesswarehome.org/acf/P_ProgramIndex.php
apps are not all portable - look for: n.i. = no install, n.r. = no registry entries

Rob Loach
http://www.robloach.net/projects/portableapplications
WackGet, Skype, NetHack, GoogleTalk

StandX
http://bintow.com/standx/Categories.htm
2005-09-04 GONE

Software für USB-Memory-Stick (German language site)
http://www.techwriter.de/beispiel/softwar1.htm

Standalone applications
http://standalone.atspace.org/

TheInfoBox.com
http://www.theinfobox.com/index.php/Portable_USB_Apps

TinyApps.org
http://www.tinyapps.org/
apps are not all portable - look for: + = no install necessary

USB Applications - USB apps and utilities for USB, USB Flashdrives, USB Drives and more
http://www.usbapps.com

1by1
media player
http://www.mpesch3.de1.cc/#1by1

AbiWord for Thumb Drives - 14.2 MB
Word Processor
http://sourceforge.net/projects/abiwordftd/
Advisory: Windows 2000 users running the batch file will find that they can't use "open" or "Save As."
Launching Program.exe writes values to the default profile, easily removed.

A43
Window Navigator
http://www.shawneelink.net/~bgmiller/

Abykus
Spreadsheet for mathmaticians. See also XSpread
http://www.freedownloadscenter.com/Business/Enhanced_Calculators/Abykus.html

Antipol
http://www.angryziber.com/tools/
Probably not needed, but this gem can break through any windows 9x policies active on the system.

Auto It 3
Scripting language
http://www.autoitscript.com

CAD-KAs pdf reader
http://www.cadkas.de/downengpdf5.php
Advisory: Installs but after installation, the containing folder can be copied to a usb drive without problems

CDCheck
CD repair
http://www.elpros.si/CDCheck/

Cool Player - 1.59 MB
Audio player - skinable
http://coolplayer.sourceforge.net/?download

Cube - 20.1 MB
Game - First Person Shooter - Multiplayer and Web play
http://cube.sourceforge.net/ (Win32 port is the 2003 version)

Diagrams
For simple diagrams
http://www.jansfreeware.com/

Dir Key
Frequent folders access
http://www.protonfx.com/dirkey/

Eraser
http://www.tolvanen.com/eraser/
To grealy shred files you wan to delete (A must if you use public PCs)

Exam Diff
compare two text files
http://www.prestosoft.com/ps.asp?page=edp_examdiff -

freeCommander
window navigator
http://www.freecommander.com/index_en.htm

Free Undelete
To recover the accidently deleted files (No way you can get files back that are deleted withEraser)
http://www.officerecovery.com/freeundelete/

Gamma Panel
display adjust
http://www.stars.benchmark.pl/index.php?show=gapa

Gen Control
remote control of the desktop
http://www.gensortium.com/products/gencontrol.html

Icon Shop
extract icons
http://users.pandora.be/liontech/Downloads.htm

IrfanView
Graphics and media view edit - slideshow
http://www.irfanview.com
Advisory: Installs but after installation, the containing folder can be copied to a usb drive without problems

IZArc
zip util
http://www.izsoft.dir.bg/izarc.htm
Advisory: Writes settings to the registry.

Junction Link Magic
NTFS 5 junction manager
http://www.rekenwonder.com/linkmagic.htm -

KeyNote
note taker with left menu
http://www.tranglos.com/free/keynote.html

MWSnap
screen capture
http://www.mirekw.com/winfreeware/mwsnap.html

MyDBF3
Simple DBas compatible database
http://www.jansfreeware.com/

Net Ping
http://www.sliver.com/dotnet/index.aspx

Neutron
Net time sync
http://keir.net/neutron.html

Open TTD
Transport Tycoon game
http://www.openttd.com

Oubiette
Password manager
http://www.tranglos.com/free/index.html -

Portable Firefox - 9.63 MB
Web Browser
http://portablefirefox.mozdev.org/

PSPad
Text editor
http://www.pspad.com/index_en.html

Serene Sound -1.35 MB
White Noise generator for working in noisy environments.
http://serenesound.com/serenesound/ -

Servant Salamander 1.52 MB
File manager
http://www.altap.cz/download.html#salrel
Advisory: writes to the registry

SamSpade
(TCP/IP & internet troubleshooting

Stinger
http://vil.nai.com/vil/stinger/
Basic virus cleansing software

TED Notepad
Notepad replacemet on steroids
http://jsimlo.sk/notepad/

Treepad Lite
For a treelike Database
http://www.treepad.com/
Advisory: writes to the registry

VNC Neighborhood
automatically discover any host running VNC
http://www.sysworksoft.net/products/vncnbhood.html

Xcalc
extended calculator
http://www.tordivel.no/xcalc/

xmplay
Audio player Low in CPU and memory needs, still being quite good
http://www.un4seen.com/