1)   ImageBadger Image Converter 4.92
Save time when working with a batch of images. Convert and process images from the Windows right-click menu. Enhance images with more than 40 image filters. Supports over 140+ image formats such as JPEG, BMP, PNG, GIF, ICON, PSD. Commandline support.

 2)   Right Click Image Converter 2.2.2
Convert between image formats from the Windows shell. Supports JPG, BMP, PNG, GIF, ICON, and several other file formats. Also can rotate/resize images. Right click on a file or a group of files in Windows, and select Convert to. As simple as that.

 3)   Solid Converter GX 1.1
Become a quick change artist. Convert multiple graphics in a single batch from one format to another. Solid Converter GX supports popular graphic file types such as TIF, JPG, GIF, or PNG. Change the color depth of your images during the process.