I've tried several screenshot programs:
In most cases I only want to capture rectangled areas of different sizes to the clipboard (for email, inserting into word, photoshop, ...). PrintScreen is a small program und works fine. But you can't add simple arrows, text or rectangles -> this would be a nice feature for e.g. tutorials. And you can't add a thin border. Later I've found Winsnap. There you can add a border and even a nice looking shadow. But the handling is not so comfortable.
So I tried Faststone FSCapture which has such features. But the handling especially of the graphic functions (adding text, ...) is circuitous, too.
And now I'm trying Screenshot Captor... There are many, many features -- maybe too much
# Problem: I've installed it with administrator rights (you need administrator rights, or?). But with restricted rights under XP you can't save the preferences, or?
# Strg+Q for deleting files is a uncommonly shortcut in XP, or? Usually you can close a program. But there is no shortcut for closing Captor (only Alt-F4?). For me it would be nice to close the program just by pressing "Esc" -- the easiest and fastest way.
# Sometimes I need the program window (to add text, ...) and sometimes I need only the captured region in the clipboard just without any changes. So ist would be nice e.g. to assign a shortcut key to open (or not to open) Screenshot Captor after making a screenshot. Or: after making the screenshot there could appear a small "kontext menu" or something like with several options: open the program, copy captured region only to the clipboard and/or to file, and so on.