SKTCH 2.0 [iPhone, iPod touch, and iPad]
The app works by utilizing presets from digital artists that you can use to create various stunning compositions (especially on the iPad) using circles, meshes, and networks. If you’re feeling adventurous and inspired, you can alter the presets’ variables to create custom sketches. In the new version you get 3D mode, which means you can rotate around your sketches and change them in three dimensions. You can learn more about it here.