Windows only: You probably do a lot of things to files and folders that could be easily automated. Enter FilerFrog, a free Windows add-on that adds image resizing, file renaming, encryption, listing, path copying and other abilities to your right-click options.
After installing FilerFrog, simply right-click on any file or folder and you'll get a context menu that gives you access to all of FilerFrog's niftier tools. Some are helpful for common annoyances, like instantly moving a folder into its higher-level container or renaming or resizing multiple files. Some are really geeky and specific, like a "touch" to create a new file or pulling off file splits and joins. In any case, you can add just your favourite functions to the favourites menu, then hide the other options if you'd like.
FilerFrog is a free download for Windows systems only and comes in 32-bit and 64-bit flavours.