At times, network admins need to change their IP address, they need to do it fast and go back and forth with the configurations. They do so for troubleshooting, debugging, testing etc etc etc…
This tiny free tool is a useful solution for that. I like the look of it too.. it is simple and open source
Technology Tab 
It says it’s for windows. Is there is version for mac?
Just for windows 🙂
in mac it could be as simple as having an simple shell script to reconfigure the ip