Robin Good's insight:
Pimagic is an excellent and super-intuitive free online image editor
accessible to anyone without needing to download, register, login or install anything.
You can easily upload any image you have, and crop it, or apply to it one of several presets which allow you to easily improve it.
Pimagic also offers a set of visual effects, similar to those available in Instagram.
Images can be saved in either .jpg or .png file formats.
The only function I was not able to find was a resizing tool. Did I miss it?
Useful. Easy. Immediate.
Free to use. Ad free.
Try it out now: http://app.pikock.com/pimagic