I remember on the mac when i found aperture i loved it so now im back on linux, well ubuntu 14.10 i thought id see if i could find something similar..
well darktable is the one – full editing of pictures and exports to flickr /facebook etc or local files.
add this to your apt sources
deb http://ppa.launchpad.net/pmjdebruijn/darktable-release/ubuntu utopic main deb-src http://ppa.launchpad.net/pmjdebruijn/darktable-release/ubuntu utopic main
update and apt-get install darktable and your away amazing bit of kit.