digiKam - Professional Photo Management with the Power of Open Source
Phontabulous - Fun, private, secure photo party with your friends
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
Vecihi - Build your own photo sharing app in 5 minutes
FastStone Image Viewer - FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor.
100 Days of Wordplay - 100 Day Project - 100 mini crossword puzzles