IrfanView – Multi-format Image Viewer and Processor

IrfanView is a fantastic freeware program for viewing, processing, filtering, organising and displaying images. It’s tiny, less than a meg in size, and it supports pretty much every image file format you can think of. It’s very fast, and is simple for beginners and powerful for professionals, supporting batch processing and renaming of images, HTML export, thumbnail browsing, Photoshop plugins, the list goes on!

It’s named after its creator, Irfan Skiljan, and is the only freeware I have ever paid for, it’s that good.