Free image converters

Free image converters
36-Image converter
Converts from/to bmp, gif, jpeg, icon, tiff, pdf, pii, etc. Other features: resize, merge, re-color, filters for eg. grayscale, roman effect, lighten, darken, etc.
Formati
(Batch) graphics file converter; load formats: bmp, gif, jpg, png, wmf, emf, ico, icl, bmp, tga, tif, pcx, pcd, psd, psp, ppm, sgi, cut and eps; save formats: bmp, gif, jpg, png, tif, tga, ico and icl. Features: 34 effects including buttonize and seamless; Shape and Text tool; Twain scan; GIF and JPG optimizer; overlays; screen capture; smart resize; turn; PNG alpha support (mask based variable transparency); adjustable blending of two images; scriptable drawing wizards (HTML+javascript); create and edit (multi-image) icons and icon libraries;
Fotosizer
Freeware batch image resizer with many features such as: flip, rotate, convert to black and white; supported image formats: JPEG, PNG, BMP, TGA, GIF.
Omniformat.com
Free document conversion utility which allows dynamic conversion and image manipulation of over 75 file formats including HTML, DOC, XLS, WPD, PDF, JPG, GIF, TIF, PNG, PCX, PPT, PS, TXT, Photo CD, FAX and MPEG. Also: optical character recognition.
Photoscape
Free image viewer, converter and editor for Windows.
PIXresizer
Freeware image resizing program for Windows. It can also convert between image formats (JPEG, GIF, BMP, PNG and TIFF), rotate images, convert to grayscale and resize multiple images in batch mode