What is LeoCad?

LeoCad is an open source, easy to use CAD program for creating Lego Models.
Although LeoCad does not support exporting models to Blender 3D, the models can be exported to 3ds format and then imported to Blender

Go to http://www.leocad.org/ to learn more about LeoCad and download the program.

The easiest example would be to use the Mini Wizard. Menu > Piece > Minifig Wizard

The MiniFig Wizard allows you to easily create your own Figure. In this example I found parts for Ironman

Once the model is complete, it can be exported to a 3ds format in the File menu.

Importing into Blender 3D

Delete the default cube, click on File > Import > 3D Studio to import your figure.

If everything went well, your LeoCad model should appear in blender.

Go to http://www.leocad.org/ to learn more about LeoCad and download the program.