NetSetMan is an advanced free IP Manager software that can be used to change IP address of your PC.
Free IP Switcher
Free IP Switcher is a free IP changer software for Windows. It can come in handy if you have to regularly switch your PC/laptop between multiple networks.
Shock IP Changer
Shock IP Changer is another free software that can help you easily switch between multiple networks. You can create multiple network profiles for your PC’s network card.
Argon Network Switcher
Argon Network Switcher is an opensource and advanced IP address changer software.
IPSharkk
If you are looking for an IP changer that lets you surf the internet anonymously, try IPSharkk.
IP Changer
IP Changer lets you save upto 6 IP configurations that you can switch between. It is an opensource IP address changer software that works on Windows.
TCP IP Manager
TCP IP Manager is another open source software to change IP address on your PC.
IP Shifter
IP Shifter is no different than most of the IP address changer software mentioned here except the support for proxy options for browsers.
To know more about these software click on the icon below.