free software for MS Windows

I generally avoid MS Windows though I occasionally investigate software for it, and accumulate the results here. If you think this list should be modified, please send suggestions to: help!

Ideally, these programs should be:

Beware that some installers may install unwanted software like browser toolbars by default; just disable those options when running the installer.

All software is open source unless marked* (with an asterisk).


Firefox
web browser; faster and more secure than Internet Explorer
Thunderbird
e-mail client; easily imports settings from Outlook and Outlook Express
OpenOffice
office applications; alternative to MS Office
PDF Printer*
PDF virtual printer; PDF output from any program that can print
Sumatra PDF
PDF viewer & browser plugin; small/fast alternative to Adobe Reader
IrfanView*
image viewer
Miranda
instant messenging client; supports many services/protocols
Exact Audio Copy*
audio CD exraction
ImgBurn* | CDBurnerXP*
CD/DVD writer
μTorrent*
BitTorrent client
7-Zip
archive utility (supports many formats including zip)

SyncBack*
backup and synchronize files/folders
Microsoft Security Essentials*
anti-virus; believe it or not, this actually works well (but it requires WGA)
Avira AntiVir Personal*
anti-virus; alternative to MSE (see: AV-Comparatives, Virus Bulletin)
Hiren’s Boot CD*
boot CD with many utilities

PSPad
text editor; regex, syntax, hex editor, diff, macros, …
AutoHotKey
keyboard control; macro-creation and automation utility; also does text expansion from abbreviations
SequoiaView* | WinDirStat
disk usage visualisation utilizing treemaps
HTTtrack
website mirror; a welcome alternative to wget
PuTTY
SSH client
WinSCP
FTP/SFTP/SCP client
TightVNC | RealVNC
VNC client & server
Cygwin
Unix-like environment

TinyApps.Org
software directory of very small/fast/efficient programs (mostly free)
Gizmos Freeware Reviews
software reviews