Mandelbrot Explorer is Freeware software, allowing the exploration of the Mandelbrot Set and the Julia Sets. The current version is 3.1, pictured below.
Note for 64-bit operating systems: Version 3.0 contains a bug which means it does not run on a 64-bit operating system. Users of x64-based systems should download and install this new version.

Mandelbrot Explorer is Freeware. That means you can use the software without paying for it. And you can keep on doing that for as long as you like. With no “nag” boxes. With no “limited functionality”. But: If you have enjoyed using it, you are invited to make a donation.
Downloads are hosted by Tucows. Please visit their site! Tucows test software in their library then award a “cow-rating” to indicate quality; the scale ranges from 1 to 5 cows. Mandelbrot Explorer has been awarded a 4-cow rating.
Click here to go straight to the page on Tucows for Mandelbrot Explorer. The file can be downloaded from there; file size is 1.83 MB
Please note that you need the Microsoft .NET Framework, version 2.0 or later, installed on your computer. Windows Vista, 2008 Server and 7 come with this Framework pre-installed. If you have Windows XP or earlier, you have probably installed it via Windows Update, but if not it is available from the the Microsoft Download centre.