Ethereal network protocol analyzer (requires WinPcap) Tesseract network traffic monitor NetMon IP connection monitor TCP View by sysinternals.com TDIMon Transport Driver Interface Monitor ItCan.Net Monitor bandwidth analysis utility
SuperScan port scanner by Foundstone LAN Network Scanner port scanner
XVI32 Hex Editor Active State Perl
Rei's More Extension (touch/icons/bitmaps/resources) PEsx dependency viewer by Johannes Plachy Hex Viewer by SOLYP Informatik GmbH RegisterEx OLE Servers tool
Dependency Walker by Steve Miller Process Explorer by sysinternals.com Portable Executable Analyzer from Johannes Plachy WCPUID cpu information tool Resource Hacker view and modify windows resources
FolderMon directory change monitor DiskMon disk monitoring Filemon file monitoring Portmon serial and parallel port monitoring Regmon registry monitoring