Act is A Conference Toolkit built in Perl, and that was used to host and run more than 150 conferences and events in the past 10 years.
After stalling for a few years, several people are interested in modernizing the code to keep supporting more and more conferences.
First attempt: YACT - http://news.perlfoundation.org/2013/05/2013q2-gp-yact---yet-another-c.html
Second attempt: Act-Voyager - http://news.perlfoundation.org/2014/07/grant-proposal-start-act---voy.html
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