IrfanView
Used by 6 peopleirfanview.com ↗

“Once I've got the highest possible resolution of the images I want downloaded, I use IrfanView to resize and compress them so I can then upload them to my site.”
Sarah Werner Interview, Independent librarian, book historian · via Uses This 
“(I also use Irfanview for simple desk-based cropping and resizing.)”
Simon Carless Interview, Gamer (GDC, IGF, Gamasutra, GameSetWatch) · via Uses This