You need to make thumbnails from your last camera shots, or to resize a large number of images ?
Here it is : a batch image tool which resizes your images and save them as JPEG.It can handle a lot of different image formats.
Resize batches of images quickly and easily for free! view it
IfranView is a powerful free tool for batch converting image files. view it
Getting your photos online with Picnik view it
Simple photo editing made online and easy with Picnik view it