Jimpl Image Splitter
http://imagesplitter.net/

Jimpl Image Splitter has the following features: a) Image Converter: Convert your images online with Jimpl Image Converter; b) Image Resize: Resize your images easily with Jimpl Image Resizer; c) Image Splitter: A simple service, which is used to split one image to several parts, d) Crop Image: You can crop your image to produce the desired part, e) Bmp, jpg, jpeg, png, gif, ico are supported; f) Customize number of rows and columns, g) No limit on the number of images to proccess; and h) Free and no registration. This has been added to the tools section of Research Resources Subject Tracer™ Information Blog.