LDraw Launcher
- DOS graphic front-end for LDraw.
- http://home2.swipnet.se/~w-20413/ldlaunch.htm

BlockCAD
- Features 3D fun drawing program using Lego like blocks. Provides a gallery, downloads, and instructions.
- http://web.telia.com/~u16122508/proglego.htm

Mosaic Maker
- Make images depicting Lego bricks from a web browser. Instructions available.
- http://www.lugnet.com/cad/mosaic/

ONYX L3PAdd-On
- A graphical user interface for L3P with more options.
- http://l3pao.malagraphixia.com/

L3P by Lars C. Hassing
- DOS program that produces a ready to render POV file from any LDraw model.
- http://home16.inet.tele.dk/hassing/l3p.html

LeoCAD
- A CAD program that uses bricks similar to those found in many toys. The program can import LDraw files.
- http://www.leocad.org/

MLCad
- Create models with Mike's Lego CAD system. Similar to LEdit/LDraw. The program creates building instructions, which show by steps how to build a model.
- http://www.lm-software.com/mlcad/

LDraw.org
- A DOS freeware program written by James Jessiman for modeling Lego models in #D on computer. Features resources, downloads, and discussion.
- http://www.ldraw.org/