Xmind - Xmind is a brainstorming and mind mapping application.
MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming
MindManager - With MindManager, flexible mind maps promote freeform thinking and quick organization of ideas, so creativity and productivity can live in harmony.
GNU Octave - GNU Octave is a programming language for scientific computing.
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
Wolfram Mathematica - Mathematica has characterized the cutting edge in specialized processing—and gave the chief calculation environment to a large number of pioneers, instructors, understudies, and others around the globe.