The Print Screen button works, but does not automatically save the file. This is fine if you only want one screenshot at a time.
Until this feature is added, if it is;
PNGShot - 353KB download, single file, no install, open source
Saves as PNG, and has a very flexible and configurable naming scheme; you can specify a base name combined with a counter and/or (all or part of) the date and/or time, in a format you specify.
On my system, there is a 2 second freeze in the demo when saving screenshots, but that is not necessarily a bad thing; at least you know you got the shot. I ran the program through
UPX to drop the files size from 688KB to 294KB.
This program thinks spreadsheet cells copied to the clipboard are graphics, and saves them as well.
Grabby - 100KB download, no install required, freeware
Good performance, with only a half second hesitation in BD. However;
- the counter re-sets whenever the program is re-started, so you would have to move the screenshots each session if you did not want them to be overwritten
- it stores its options in the win.ini file. It is only 8 lines, but it is not a good thing to do.
Hardcopy - 1.7MB download for install, 1.8MB for optional add-ons, donationware
very good performance. fairly powerful, though complex, program.
Available in Danish, German, English, French, Dutch, ...