The beta testing phase of NXT has started. You can download the client here:
https://mega.co.nz/#!3pImwbbA!DeQTSC6Yhb5lxRsPYLOh7DF121A5DtZOTDFTUWTQqj8
or use the web client here:
You can test the client by sending and receving Nxt coins. Unlock any account with a secret phrase from “1” to “10” to be able to send coins.
Please remember that this is a beta test version, real coins are not involved.