We get a lot of requests from people who are looking for something similar to a free version of Photoshop that they can download and use on their computer. We don't offer a downloadable version of Pixlr Editor, our graphic design app that works in your browser. We don't have plans to offer that in the future, but Pixlr Editor works great in most any browser as a Flash-based app.
Downloadable apps we offer
You can, of course, download Pixlr for Mac and PC, but it is a different app that is more suitable for editing photos than doing graphic design work. Check this article out to see the visual differences between Pixlr Editor and Pixlr for Mac and PC. Here's an even more complete breakdown of some of the differences