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Microsoft added a new command line tool to Vista and Windows 7: clip.exe. This nifty little utility allows user to copy program output to the clipboard on the windows command line. Its usage is pretty straightforward:

dir | clip – copies the output of the dir command to the clipboard
clip < example.txt – copy the contents of the file example.txt to the clipboard

It’s pretty convenient to list and kill processes using ps and kill / pkill on *nix. Actually, you can do that on a Windows command line as well:

• tasklist: shows a list of all running processes
• taskkill: kills processes

Among other options, processes can be killed by their process ID (taskkill /PID 4711) and by the name of their executable (taskkill /IM firefox.exe).
So, if you have perl scripts running wild, just execute taskkill perl.exe to kill all of them down with a single command.

More lesser known Windows commands are described in this PDF.