One of alternatives is MSYS2 , in another words "MinGW-w64"/Git Bash. You can simply ssh to Unix machines and run most of linux commands from it. Also install tmux!
To install tmux in MSYS2:
run command pacman -S tmux
To run tmux on Git Bash:
install MSYS2 and copy tmux.exe
and msys-event-2-1-6.dll
from MSYS2 folder C:\msys64\usr\bin
to your Git Bash directory C:\Program Files\Git\usr\bin
.