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
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+Qscale N/A Faster image scaling support