I found this 2 quite interesting, one is named ACADEMY and seems was developed by a German team in 1994, and the second one is named FxCAD from 1996, and seems was developed from an Italian team.
I tried to find any details about that software and or people that was developing it, but the only thing i found on the net is the name of Guido Quaroni of FxCad team, that besides to be an italian voice actor, he was an software engineer that developed the first version of SolidThinking an 3D nurbs modeller for NeXT. Eventually he transfered to US and joined Pixar been one of main persons in Toy Storry series of cartoons and others.
(Wikipedia source)
I have tested demos of both programs on openstep 4.2 and can say they work quite amasingly well for their age. Eg. comparing to that, and if i remember correctly, AutoCad in mid 90's was just passing From dos to Win 3.11 and the first tries were really disastruous.

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from the 'Readme' of ACADEMY
Category " Graphics"
Price $1395
Promotional $1195
Availability
Motorola - August
Intel - August
European Distribution
Cube Infosysteme GmbH
+49 711 13 10170
+49 711 6788672 fax
info@cube.de
North American Distribution
Dominion Technologies, Ltd.
(409) 696-1578
(409) 862-2496 fax
academy@dtl.tamu.edu
ACADEMY™ is a 2D CAD program which through its open and flexible structure, extends across many business fields, from mechanical and electrical engineering to architecture. The graphics engine, already in use on other hardware platforms, was combined with NEXTSTEP to make ACADEMY™ powerful, yet easy and logical to use. You won't find cryptic commands, endless parameter lists and time wasting dialogs or complex menu structures. However, the well designed usage concept still allows for precise numerical inputs, calculation of geometry and construction data as well as exact placement.
ACADEMY™ is able to import and export the .DXF format which is the interface to the PC world and the output of postscript, builds the bridge to the DTP world, making technical documentation and the creation of catalogs quick and easy. The unified Postscript imaging model allows true WYSIWYG while still allowing output to Non-Postscript devices such as those using HPGL. QuoteAutoCad in mid 90's
I tested AutoCad™ Release 12 (june 1992) for mac

not smooth, several crashes
http://en.wikipedia.org/wiki/AutoCADi use ArchiCad since 1991
earlier: minicad 1986, ashlar vellum 1989,