Amit at Digital Inspiration writes about a pretty slick program called Bug Shooting that does much of what Snag-it does. That’s quick screen captures or area captures that can be marked up to illustrate or explain. It says it’s WinXP or Vista only, but it’s running on my Win2K machine as well. It’s not nearly as slick as Snag-it, but if you need to capture and annotate and want to do it for free, this’ll definitely do the trick!