the Perl interface to the ElasticSearch opensource, full text, cloud-ready, distributed, all-bells-and-whistles Lucene based search engine
load a configuration directory tree containing YAML, JSON, XML, Perl, INI or Config::General files
XSS filter using HTML::Parser
Health metrics (blood sugar/weight etc)
Social media ranking
Number of open source contributions
Number of books I've read
Results (120 votes). Check out past polls.