Picture Processing

XnView - Find files, load for batch processing, create mosaic of images, tabbed

FastStone Image Viewer - Excellent interface, wallpaper anywhere, annotate, draw, resize

Cam2PC - Move files from flash memory, rename files and folders based on date, lossless rotate based on EXIF - all done automatically

Irfanview - Limited Find, fast live thumbnails, batch scanning

XnConvert - Use multiple cores to resize faster than XnView

Gimp - healing brush, layers, select by color, feature rich G'MIC - Gimp Plugin, tile pictures

Photoscape - collage, unique, great for animated GIF's

Awesome Duplicate Photo Finder - Simple and effective

Paintstar - Small lightweight powerful editor

Posterazor - Make a poster of any size by tiling paper, outputs PDF's