Wikipedia
Pixlr
Pixlr is a cloud-based set of image tools and utilities, including a number of photo editors, a screen grabber browser extension, and a photo sharing service. The suite was intended for non-professionals, however the apps range from simple to advanced photo editing. It can be used on PCs, and on smartphones or tablets using a mobile app. Time put Pixlr on its list of the top 50 websites of 2013. It has web-based 'paint' features similar to online image manipulation software such as Sumo Paint.