Program/module name Debian package Usage mod_perl2 libapache2-mod-perl2 Running it all :-) apreq2 libapache2-request-perl Parsing CGI parameters libapache2-mod-apreq2 PerlMagick perlmagick Scaling etc. MIME::Types libmime-types-perl Sending the right MIME types DBD::Pg libdbd-pg-perl PostgreSQL connection Image::ExifTool libimage-exiftool-perl Parsing EXIF data Digest::SHA1 libdigest-sha1-perl Verifying passwords Digest::HMAC_SHA1 libdigest-hmac-perl Verifying digest passwords HTML::TagCloud libhtml-tagcloud-perl Tag cloud on /+tags/ jpegtran libjpeg-progs Lossless JPEG rotation dcraw dcraw NEF support Qscale N/A Faster image scaling support