WaveL Pic2Pic Plus Description:

This is an advanced utility for batch conversion of image files with resizing, rotation, mirroring, and color resolution adjustment.
Using Pic2Pic Plus you will be able to convert your image files from BMP, EMF, GIF, ICO, JPEG, JPG, PBM, PCX, PGM, PNG, PPM, TIF, TIFF, TGA, WMF formats to BMP, JPG, GIF, PBM, PGM, PNG, PPM, TGA, TIF formats.