TripleA - TripleA is a free (under GPL) turn based strategy game based on Axis & Allies board game.

Xmind - Xmind is a brainstorming and mind mapping application.

Particlescape - Particlescape app lets you create stunning patterns at your fingertips.

MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.

Gravity Free - Gravity Free – Light Particles Manipulation App developed and published by Kfirapps Limited.

Coggle - Coggle is a simple, beautiful, powerful way of structuring information.