ACDSee - ACDSee is an image viewer that uses very little system resources, and it has a small, sleek size that won't take up much space on your system.
Pixave - The ultimate image organizer for the Mac.
digiKam - Professional Photo Management with the Power of Open Source
Eagle App - Unify your creative inspiration in one place. Store anything – inspiring images, design mockups, illustrations, screenshots and more.
Flickr - image and video hosting website
EagleFiler - EagleFiler makes managing your information easy.