OT: phone applet for OTP or two factor authentication, for remote access

[scorch]

about 2 months ago, I found a URL for an opensource applet that runs 
inside a std mobile phone, generating something like a securID token, 
for authenticating remote access, without the need for the additional h/w.

of course, now my customer is interested in such a solution but i can't 
find the link again (damn those bookmarks..)

can any OT:reader provide me with a reminder URL?

thanks,
scorch