4Front (gb)
Lisp generator, the automatic program generator for autocad - create any autolisp routine you want without writing any of the code.
http://www.4front.com/lispgen/index.html
Cadtools On-Line (gb)
Professionally drawn autocad and autocad lt symbol libraries covering various engineering disciplines.
http://www.cadtoolsonline.com/
Geocomm (gb)
The geocommunity provides free and shareware gis and cad software tools, utilities, compression programs, translators, and map viewers for mapping and location based applications
http://software.geocomm.com/scripts/cad/
Schorsch Cadtools (gb)
Schorsch Cadtools (gb)
http://www.schorsch.com/download/autocad.html