WiFi IP Changer (com.redinput.wifi) on Google Play
** Only for advanced users!!! **With this application you'll can change wifi settings (IP, Gateway, Netmask and DNSs) of your device with only 2 touches.It allows you to create infinite profiles and apply them directly from the application or from the widget.** Because changes introduced in Honeycomb this application is only available to devices running Android 2.3 or lower.** Source code available at http://git.redinput.com/wifi-ip-changer/