Sequence diagram reverse engineering

[wasabii]

Hi all,
I am looking for a free tool for reversing java code into sequence diagrams.
3 years ago, I used a small and very efficient sharware for such task.. but
can't remember the name and can't found it on the net.

Regarding the commercial tools, I think that Vparadigm is still not
supporting such feature neither in std neither in entreprise version. And
Omondo is very expensive..

To summarize, I am looking for a free tool, or if it's doesn't exist a very
cheap commercial one.

Thanks for your support,
Wasabi.