in reply to Get me excited about perl
Hey there from Seevast up on North Forest :)
For batch programming there's GNU/Parallel that is pretty awesome in my opinion. While it's written in Perl, it doesn't require jobs be written in any particular language but it's just a joy to use regardless.
For web programming there's Plack which has not been mentioned yet but is a pretty exciting and fairly recent development. Show your coworkers how they can make a web framework complete with templating engine and database connection in a few lines of code that can run in pretty much any webserver. Plack commoditized web servers and now it's trivial to write one for every little task.
If they're more on the PL theory/language nerd end of the spectrum, perhaps show them stuff like Devel::Declare which lets them define mini languages (as long it can be expressed as a subroutine reference) and maybe Keyword::API (never used it myself).