LeoCAD 17.02

A CAD program that uses bricks similar to those found in many toys

LeoCAD currently has a library of more than 1000 different unique pieces (but they don't represent any particular brand), most of them created by James Jessiman (the author of LDraw).

LeoCAD is a CAD program that allows people to build virtual models using bricks similar to those found in LEGO toys. LeoCAD can be used to create building instructions and animations, making it a very powerful editor.

Each object in a LeoCAD project can have a different position and orientation for each step or frame that it appears. This feature is called keyframing, and works differently if the program is in Instruction or Animation mode.

This is very useful when creating instructions because it allows you to have a door open in one step and closed later, or have the camera display the model from a different angle on a certain step to show details from another section of the model.