WiFiDog is a complete and embeddable captive portal solution for wireless community groups or individuals who wish to open a free HotSpot while still preventing abuse of their Internet connection.

It's client-side half is written in C and is light enough to run on the Linksys WRT54G.  It's auth-server half is currently a PHP implementation.

More information at the [[http://www.wifidog.org|WiFiDog home page]] at [[http://www.ilesansfil.org|IleSansFil]]