i have recently used XnView
reads 400 formats, and converts into 50. and as well its FREE.
http://www.xnview.com/
It has the features : (DIRECTLY COPIED FROM WEBSITE)
Import about 400 graphic file formats
Export about 50 graphic file formats
Multipage TIFF, Animated GIF, Animated ICO support
IPTC, EXIF
Resize
Copy/Cut/Crop
Adjust brigthness, contrast...
Modify number of colors
Apply filters (blur, average, emboss, ...)
Apply effects (lens, wave, ...)
Fullscreen mode
Slide show
Picture browser
Batch convert
Thumbnail create
Screen capture
Contact Sheet create
Multi-page file create (TIFF, DCX, LDF)
TWAIN support (Windows only)
Print support (Windows only)
Drag & Drop support (Windows only)
44 languages support (Windows only)
And many many other things...