win32

Boot loader manager

Simple, manual window tiling

Hex editor

Serial terminal interface

GUI development

XP compatible AV/firewall

Additional AV protection

XP compatible AV

AV

Config services and startup programs

Cleaner program uninstall

System monitor

System resource recorder and handle monitor

Better terminal with mouse support

Best gdb front-end I've found on Windows, since TUI is not supported

For mingw use

Terminal for msys2, cygwin and WSL

For WSL X11 programs

SSH win32 client

WinDbg alternative

Debugger for MSVC toolchain, with reverse debugging

perl for win32

Phone calls

RDP client

Wireshark but understands Windows/Microsoft specific protocols

Simple image editor

Shred for Windows

PDF reader

Open source compiler toolchain

RIght-click context menu entry for filesystem links

File archiver

Package manager

Unix basic tools

SVN win32 client

CVS win32 client

tmux-like thing

Orthodox file manager with remote (S)FTP and SSH support

Fastest

Better task-handling features

Persistent history with search, and emacs keyboard shortcuts

Automate Windows shell

Focus-follows-mouse

Unix behaviour

Unlike tkdiff, it handles Windows input OK (e.g. svn --diff-cmd).
Unlike meld, it starts quickly.

Console orthodox file manager with all Windows Explorer features

Simple notepad.exe replacement with tabs and infinite undo

Clipboard manager