Here are 2 grasshopper with a VB script that generate blades for propeller. Surely not perfect but work quite well. At the moment there is NACA 4 digit and custom profile generation done with Graph Mapper. I also use a lot of Graph Mapper

The first file was for GH 0.8 and old Rhino library 

The second file is a reply to "metinsaylan". It works with GH 0.9, Rhino 5 and the new library (there is sill corrections to do)

See photos on my first Album with propellers