IrfanView is a fast and simple image viewer and editor that supports all major graphic formats, including BMP, DIB, JPEG, GIF, animated GIF, PNG, PCX, multipage TIFF, and TGA.

Size = 1.1 MB

All the IrfanView plugins you'll need.

Size = 6.2 MB

Noiseware CE (Community Edition) is a free program that can remove or greatly reduce noise from digital images while keeping the details. It is different from most image processing software that employ simple methods such as median filters in that it employs a sophisticated yet fast algorithm that uses the “adaptive noise profile capability” and sharpening function to deliver excellent and quick results.

Size = 1.91 MB

Version = 2.6