Finding the process belonging to a given TCP/IP port

Finding the process that listens on a given TCP/IP port isn't too hard, but of course, each O/S insists on doing it differently.
Some possible approaches for different operating systems (examples for local GWT server listening on port 8888):

Mac OS X
sudo lsof -i TCP:8888

Windows
netstat -ano | findstr 8888

Linux
netstat -ano | grep 8888

I'm sure there exist more elegant solutions, but these work for me :-)