WARNING: this is an early preview and was published as proof of concept. It's not compatible with the reference implementation, which was published later and changed the protocol. Once the protocol and the whole spec is final, this client will be compatible. Until then only use this client as demo or showcase and spread the idea of SQRL.
SQRL is a new login method. It stands for secure, quick, reliable login and solves many issues we are facing in the current web. Username/password combinations aren't needed anymore.
Your identity is stored on your device and never leaves it. Each website receives its own random secret, which you don't need to remember. In order to protect your key, you need to choose a password for encryption. That's the only password you'll ever need.
To login it's only necessary to scan a QR-Code from the website. That's it, after that you are logged in.