Carter Cross, our 3D guru at Media Box, has developed a plugin for Cinema 4D called Primitive Sketch. It allows you to create primitive objects anywhere on the grid as well as on other objects and planes. Stop moving and rotating your objects into place, just click, drag and size it up! Save yourself time, improve your workflow and have more fun when modeling in Cinema.
Primitive Sketch in action.
Two versions are available for download. The free version gives you the ability to draw on the home grids, while the $5 paid version also gives you the ability to draw on other objects and construction planes.
Check it out here.