WP-Imagefit is a plug-in that  Chris Messina author of FactoryJoe, and Co-Founder of Citizen Space has released.

He describes it as

WP-Imagefit is extremely simple and serves one purpose: to get images in blog posts to fit inside the columns that contain them. In fact, this plug-in is used on this blog, so if you see ever images load wider than the column and then quickly snap to fit the container’s width, it’s this plug-in that’s doing that.

As you may of noticed I have changed my theme, and am now using k2. The main reason I did not switch is because all of my images worked fine in my old theme, but would not in k2. This plug-in has made it wicked easy to fix that problem!! Thanks Chris!

You can find WP-Imagefit at it’s WordPress Project page, or his web site, FactoryJoe