PixTwix 

PixTwix is an image processing ActiveX control featuring over 150 methods for manipulation and enhancement of images, special effects and filters, layer blending, selection routines and more. PixTwix can read and write many popular image formats.
image processing selection irregular non-contiguous region magic wand undo rotation color channel mixing red eye effect color clamping convolution

Neomesh Image Converter 

Batch convert between image formats while resizing or applying batch effects. Join images together to create one. Create Gif animations with transparent backgrounds.
image converter convert animate join resize thumbnail batch bmp emf gif ico j2k jpg jpeg

TotalImageConverter 

Total Image Converter helps you to convert image sizes and formats. ImageConverter is unique - it supports almost all popular formats (JPG, GIF, BMP, PBM, PGM, PCX, PNG, PPM, TGA, TIF, WMF, EMF).
image convert converting jpg gif bmp pbm pcx png ppm tga tif wmf