GRAPE (GRaph shAPE) is a shape gram­mar edi­tor based on graph gram­mars. It cur­rently uti­lizes the pack­age GrGen.NET and is imple­mented as plug-ins for Rhino 5 and Auto­CAD 2011.

Hard­coded rules can sup­port para­met­ric shape gram­mars in U₁₃ x V₀₃. The visual edi­tor, which is a more recent addi­tion sup­ports para­met­ric shape gram­mars in U₁₃. GRAPE is based on con­strained topol­ogy graphs and can han­dle sub-shape recog­ni­tion under sim­i­lar­ity transformations.