Grasshopper basics (part 1)

Commands

Curve
Loft
Offset Surface Number Slider Panel
Construct Point Polygon
Move
Unit Z
Cap Holes Scribble
Divide Domain2 Surface Box
Brep
Bounding Box Box Morph Surface
MD Slider Construct Domain Iso Trim
Area
Distance
Remap Numbers Evaluate Surface

Full list of commands available at McNeel.com