This article is full of alternatives to popular software on Windows and Mac, which is not available on Linux.

Feel free to add software to this list in the form of a Pull Request.

http://alternativeto.net/ is a very helpful site for finding alternatives to software.

Description: Photoshop is Adobe's photo editing, image creation and graphic design software. Photoshop is very helpful for creating wireframes and mockups of websites.

Alternatives:

• GIMP
• Inkscape