LeoCAD - A CAD program that uses bricks similar to those found in many toys. The program can import LDraw files. The LDraw Model Repository - Building instructions for official models (in LDraw format). Includes castles, space, town, and train model files. LDraw.org - A DOS freeware program written by James Jessiman for modeling Lego models in #D on computer. Features resources, downloads, and discussion. ONYX L3PAdd-On - A graphical user interface for L3P with more options. LDraw Launcher - Features DOS graphic front-end for LDraw. Instructions included for lego drawing. Mosaic Maker - Make images depicting Lego bricks from a web browser. Instructions available.