NAT/Gateway/Firewall for windows XP

ipgateway:

http://www.ntkernel.com/downloads/igateway.zip

Untangle

http://www.untangle.com/Products/untangle-libitem-lite-package

http://sourceforge.net/projects/untangle/files/

http://sourceforge.net/projects/untangle/files/untangle/Untangle%20v5.4.2%20%28Falcon.2%29/untangle_542_setup.exe/download

Virtual Access Point

http://www.virtual-ap.com/

Padnet

http://www.androidtapp.com/pdanet-for-android/