From the quick and dirty tools category, FastStone image tools work well and don't ask many questions. There is the
Image Viewer (which is a browser, image editor, and converter),
Capture (a screen capture utility that captures almost everything on screen, even flash),
MaxView (a image viewer), and
Photo Resizer (a batch converter, renamer, resizer). I use both the Capture application and sometimes resizer when I have a lot of pictures all at once that I want to convert or rename. They aren't by any means Adobe quality picture tools, but they work fine, and the are cheap too. You can't get much cheaper than free.
Tags: batch, browser, convert, faststone, image, photo, picture, resizer
