a parametric 3D CAD modeler
A CAD application for creating virtual LEGO models
The programmer's solid 3D CAD modeller
Model Railway CAD program
Free and open source pattern design software
Free software for maps
very good CAD software
LibrePLM integrates CAD editors in Odoo / LibrERP
Create and edit LDraw™ parts quick and easy.
PyAMS (Python for Analog and Mixed Signals) CAD approach
Open Source Desktop GIS with Surveying and Cartography Functionality
GDSread reads and converts Calma GDS stream files .
Free pcb editor
Solve Alignment of Road , Rail,Tunnel
Cross-platform Open-source 2D CAD
CAD application for Technical Drawing exercises in Android
SOLVESPACE is a free (GPLv3) parametric 3d CAD tool.
CAD Application entire developed in Python
Helps with the Mach3 CNC Threading functionality
Free CAD software
Free cad viewer for 3d drawings in different formats
CAD application for Technical Drawing exercises
Lightweight L5e vehicle with freely accessible engineering documents