I'm looking for user interface prototyping software. I like Axure, but it is not available on Linux, so I'm looking something similar with it. What open source project do you use for basic UI prototyping? What are pros and cons?

P.S. Software must work on Linux.

  • You can use a LAMP stack for Mockuptiger (mockuptiger.com) and use it as a local desktop web based app
    – Nilesh
    Jul 18, 2011 at 22:02

3 Answers 3


We use the Pencil project, it uses XUL so it's multiplatform.. It's available as a Firefox addon or standalone application.

  • Pencil really looks nice
    – Quamis
    Oct 28, 2010 at 12:34

Balsamiq Mockups For Desktop is AIR-based and therefore cross-platform. Balsamiq is great because it's very straightforward as opposed to a more "enterprisey" app like Axure. It's not open-source.


Also, http://gomockingbird.com is an online alternative to Pencil, and http://connectasketch.com is a nice way to link sketches into a navigable prototype.

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