MySQLTuner is a script written in Perl that will assist you with your MySQL configuration and make recommendations for increased performance and stability.

Nikto web server scanner

ExifTool meta information reader/writer

LaTeXML: a TeX and LaTeX to XML/HTML/ePub/MathML translator.

a filter module which can do both regular expression and fixed string substitutions for nginx

Perl Multithreaded Multipart sync to Amazon Glacier