Grid Master is a andvfx tool for thinking Particles and 3dsmax. Download for free on: andvfx.com/grid-master/
It creates particles following a grid, you can select a mesh to start emiting from, diferent particles behaviours, timing when particles will change direction and so on.
The tool is inspired by the work of Tim Borgmann on Nissan Altima comercial: vimeo.com/48823907
After some research I found a similar tool in thinking particles but in cinema 4d from Simon Fiedler: vimeo.com/52803528 The cool thing is that looking his tool we arrive to the same using a totally diferent approach,this is the power and flexibility of TP.