Darktable is a photography workflow application: a virtual lighttable and darkroom for photographers: it manages your digital negatives in a database and lets you view them through a zoomable lighttable. it also enables you to develop raw images and enhance them. Thanks to robvelor for the recommendation. (Thanks to all those who've suggested apps. I will try to review them at some stage. :-) Download and install instructions here: http://darktable.sourceforge.net/install.shtml Get Dropbox: https://db.tt/Qg1VIS9T