For designers who are exploring new shapes using generative algorithms, Grasshopper® is a graphical algorithm editor tightly integrated with Rhino’s 3-D modeling tools. Unlike RhinoScript, Grasshopper requires no knowledge of programming or scripting, but still allows designers to build form generators from the simple to the awe-inspiring. Grasshopper is included in Rhino 6.
In general, you will find a lot of information online just by doing a google search. However, a good place to start to acquire more information about Grasshopper can be found here:
(You have to create a free account at Food4Rhino to download these plugins)