“The name digiKam may not ring a bell with many serious
photographers and shutterbugs, but if you are in the market for a
powerful photo management tool that sports a slew of pro-level
features without a mind-boggling price tag, digiKam
(http://www.digikam.org/) definitely deserves a closer look.“digiKam is an open source application that combines photo
editing and management features. digiKam may not be as polished as
commercial tools like Lightroom or Aperture, but behind its
unassuming appearance hides an impressive collection of genuinely
useful tools. The application offers photographers functionality
that covers the entire photographic workflow: from importing and
organizing photos to batch processing and sharing them. Being an
open source application, digiKam has a vibrant community of users
and developers which produce a steady stream of digiKam releases
that sport bug fixes and new features.”