GIMP, Pixlr and Paint.NET are great free alternatives to Photoshop. This video shows what they offer, including layer-based editing, a history panel, various filters, and the ability to open Photoshop psd files. The links for the software are:
http://www.gimp.org/http://www.pixlr.com/http://www.getpaint.net/
More videos on computing-related topics can be found at: null
You may also like my ExplainingTheFuture channel at: null
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