enThread

If you're looking for a quick and easy image editor that requires little to no knowledge about anything other than the internet, then enThread may be just what you need. There is no software to install or anything. Just visit the site and start editing. It's all in your browser. In order to use the service, you simply drag your photo that you wish to edit into the interface which is a simple script embedded into the webpage. Using the provided tools for color, hue, saturation, etc., you can improve your photos and give them semi-professional quality.

In order to save your edited images, registration is required, but never fear. Users aren't even required to enter any information at all beyond an email address, and it's totally free. This is definitely a cool little web app that is worth a look. It takes hardly any time at all figure out and master.

Below is a look at the clean design of the interface. Controls for editing are categorized on the right.