Digital cameras of today produce photos that are far too large to just easily upload and use on the Internet for general things like Facebook or blogging and for this reason you should always keep a good image resizer and cropper tool close at hand, for manipulating those big images when you need to. One of the oldest, simplest and quite effective online image resize and crop tools out there is PicResize.com, having been running since March 2005 already!
It features a very uncluttered, simple to use interface that allows you to upload an image from your machine, use a crop bounding box to crop if necessary, select from a dropdown or input custom resize values, apply cool filters just for the fun of it and then save it back to your desktop.
Simple, powerful and effective.
Just what a good online tool should strive to achieve!