Easy to Use Windows Digital Photo Software?

I need a recommendation or 6 for some easy to use Digital Photo software for Windows. I’ve got some friends and relatives that have nice digital cameras but are struggling with getting images cleaned up and into a suitable format for emailing, etc.

The software needs to do simple things like cropping, level compensation, export to standard sizes for email/web/etc. :scare: Easy to use :/scare: is the key here. Something along the lines of iPhoto for Windows. Please post suggestions in the comments. Thanks!