Lasso is a GPLed implementation of the Liberty Alliance single sign-on protocols. I’ve been thinking about single sign-on at work, both for internal services (where we already have a login that could be used as the single sign-on: the Windows login) and for external services (where we do not). Is this what Project Liberty does? Can I use it for this? That would be pretty alarmingly cool. And Free Software, to boot, yay!