IrfanView is free image viewer application for Windows.

Phatch (PHoto & bATCH) is a raster graphics editor used to batch process digital graphics and photographs. Phatch can be used on the desktop as a GUI program …

Light Image Resizer can resize and convert images one by one or in batch as well as other features.

Viu 2 is a free image viewing/browsing software.

XnConvert is a powerful and free cross-platform batch image processor, allowing you to combine over 80 actions.

Image Tuner is a free batch image resizing, renaming, conversion and watermarking software with a super-intuitive and straightforward interface.

Caesium is an image compression tool.

ImBatch is a batch image processing software.