Tools I can't live without...
Audio
EAC - Exact Audio Copy (Copy your CDs to
HDD)
FLAC (incl. in EAC)
foobar2000 (best audio player ever)
IsoBuster (in case EAC doesn't do it)
The GodFather (tagging/managing tool)
Development
JetBrains (Dev Suite)
Process
Monitor
PSPad (for HTML/CSS/PHP/JS/etc..)
HDD
Bulk Rename Utility
explore2fs (explore EXT2/3 partitions
with Windows)
HD Tune (HDD benchmark)
hkSFV (hash + MD5, oldie but
goodie)
Network
FileZilla (FTP Client/Server)
inSSIDer (WiFi-Scanner)
PuTTY (SSH, Telnet, ..)
mRemoteNG (Multi Remote Connection Manager
WireShark
Office
Adolix Split & Merge PDF
Bullzip PDF Printer
Foxit Reader
OpenOffice
Video
AVIMux GUI
Handbreak
MakeMKV
VLC media player
Visual
IrfanView
yEd Graph Editor
ZoomIt (pause-timer
for presentations, draw on your desktop)
MISC
7-zip
DEAMON Tools Lite
ImgBurn
KeePass (Password manager)
Pidgin (Multi-IM)