FreeClip – Free Clipboard Extender Program
Another Clipboard extender. This one will hold 25 clips moving the earliest [oldest] one out of memory when the 25th clip is added and will give a preview of the clips as the cursor hovers over the Clipboard box interface.
Link: Free Clipboard software program: Free Multi Clipboard by M8 Software
Download link: Download Multi Clipboard by M8 Software
Edit: Related utility: 101 Free Screenshots
Add callouts and labels and organise your screenshots to get your point across.
Link: 101 Free Screen Shots
Download link: Download 101 Free Screen Shots
Not the best looking software ever but it will do the job!