Sharpshooter... Rename your screenshots with pinpoint accuracy. Sharpshooter is a small utility which aids the management of screenshots.

When you take a screenshot on Mac OS X with Command-Shift-3 (or with another variation) Sharpshooter will present a window where you can review the picture and choose what to do with it. You can either rename it from its default name to something more descriptive, move the screenshot to the Trash, or cancel the operation keeping the screenshot as it is.

Sharpshooter has the ability to work with screenshots that span multiple monitors. If you have more than one display connected to your Mac, some screenshots will produce a separate image file for each monitor. With Sharpshooter, you have the choice to rename the screenshots as a group (e.g. typing "All Displays" would rename the files to "All Displays.png" and "All Displays (2).png"), composite the separate files into one large image, or just decide what to do with each file in its own separate window. There is a global preference to control the default behavior, but if you wish to take a different action for a particular screenshot, there is an action button in the renaming window toolbar for this purpose.

Sharpshooter is a background agent application so you may want to add it as a login item to always have it running in the background. You can control Sharpshooter through the menu status item on the right side of the menubar.