imgrid

Cut image with draggable grid into smaller images, and export the latter to pdf with presets like A4. Include an automatic margin removal mode. This is the most powerful and easy to use variant you can find on internet.

Usage:

1. Load image with open image button, drag-and-drop, or Ctrl-V from clipboard
2. Drag the selection and set grid number.
3. Enable margin removal to remove margin (very intelligent).
4. Enable preview mode to see where the images would be cut.
5. Use Ctrl-Scroll and drag to zoom and pan (works with touchpad), and thus do high-precision adjustment. Use Ctrl-0 to reset perspective.
6. Export images or pdf based on presets or customized size.

Scenarios

1. Un-downloadable web docs (pdf displayer, google docs, google presentation, etc.). First use a scroll screenshot browser extension like GoFullPage. Then use this program to export pdf. The resolution is the same as your screenshot.
2. Cut research image results to individual images
3. ...