Pixlr - another excellent online image editing service.

Pixlr is an online image editing service styled after Photoshop. While it may not be as powerful as some other similar services in terms of features, it is very fast and includes most commonly used functions from Photoshop. Although it is built on Flash, it feels smooth and responsive, and in fact, Pixlr can be even faster to use compared to using Photoshop on a desktop. Additionally, Pixlr's interface design is quite simple and clean, without any unnecessary clutter. However, for those who struggle with English, there might be some obstacles when using the service.