I have found a link that should interest you. Christian Borgelt wrote a scientific paper on an FP-Growth algorithm. The link in the appendix of said paper is no longer valid, but I found his new website by googling his name.
There is source code in C as well as two executables available, one for Windows and the other for Linux. The software is licensed under LGPL.
You'll also find his paper as a pdf, that would probably also be of interest to you.
Here you go:
http://www.borgelt.net/fpgrowth.html[
^].
Lots o' luck!
Cheers,
Manfred