Sherpa is just-another-one wifi hot-spot access point.

But, unlikely the competitors, it is self-sufficient. No external RADIUS server nor access control server required. Even access-code cards could (and should) be generated on access point itself using web interface.

Technically it is a firmware for WRT54G compatible routers based on OpenWRT.

In compliance with the terms outlined in the GPL license agreement, access to all "Sherpa" system sources is provided at wifi-sherpa on GitHub page.