Free JDBC Type 4 Driver for DBF under Linux

I am trying to fetch and update massive data from DBF files.

I know only possible solution for this under linux is to use Type 4 JDBC.
I googled it but found couple of type 4 drivers which are not free.

I just need to know is there any free JDBC type 4 drivers available for DBF files under linux.

If someone using any free type 4 drivers please guide me through.
I am really sick of searching on the web now.

Also people in same boat please share ideas.

Otherwise I have to start comparing commercially available type 4 drivers.

Cheers,
Uppal.