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PSGI/Plack - Perl Superglue for Web Frameworks and Web Servers
plackperl.org/, posted 2012 by peter in development free perl
PSGI is an interface between Perl web applications and web servers, and Plack is a Perl module and toolkit that contains PSGI middleware, helpers and adapters to web servers.
PSGI and Plack are inspired by Python's WSGI and Ruby's Rack.