Windows XP has some nice add-ons called powertoys, these are quite useful and increase your productivity. Out of these Image Resizer is the most useful, you don’t need to open Photoshop to just resize an image or a bunch of images, Image Resizer powertoy will do that for you in a mouse click. But this only work with Widnows XP, so some dude has created a clone of Image Resizer Powertoy that works with other Windows versions as well. It supports Windows Vista, XP, 2000, NT, 98 and 95.
Once you install this app it will add a link to mouse righ click context menu. Right click on any image or a bunch of images to resize them. Download Powertoy Clone