Sprite sheet cutter
For permanent links you can use: https://ezgif.com/sprite-cutter?url=https://example.com/source-image.gif
Online sprite sheet cutter / splitter tool
Free online tool for cutting image sprites to individual images.
Enter tile size or the number of columns and rows, and this tool will slice the image for you, outputting images in PNG, GIF or JPG format.
You can download all images at once as a ZIP archive.
You can also use this tool as a sprite sheet to GIF converter, to make an animated GIF out of sprite sheet, by first slicing the sprite, and then selecting "Create GIF animation" option.