I searched and found this thread from 25 Jan 2005 where it says

Just have a look at the free, open source FIX implementation QuickFIX:

http://www.quickfixengine.org

This is a full FIX implementation used in production at several exchanges (CME, SWX, XETRA etc) and an increasing number of clients. Nevertheless, you can download it, look at the sources, the acceptance tests which contain many FIX examples messenges and at the example clients. On the website, you find a couple of links to some other, useful information.

Currently supported APIs include C++, Java, C#, VB.NET, Ruby and Python.
While a Perl module is not available at the moment, the Python API may be a good starting point to add a Perl API. QuickFIX is being actively developed and its mailing list is quite busy and very responsive. So do not hesitate to join and ask questions. I am sure you will have a working client in a short time.

update: here's another discussion.