1)   FastRes 1.0
FastRes lets you quickly change your screen's resolution and color depth, from the system tray. It is small, and takes up very little memory.

 2)   Blaze ImgConvert 2.05
Advanced batch image conversion supporting over 140 formats and an entire arsenal of options and features. Comprehensive support for compression, sub-formats, color depths, naming templates, and resizing/rotating in the same operation are available.