FreeCAD is an OpenSource CAD/CAE, based on OpenCasCade, QT and Python. It features some key concepts like Macro recording, Workbenches, ability to run as a server and dynamicly lodabel Application extensions and its designed to be platform independend...
ProfiCAD is the quickest and easiest way to create electrical documentation and schematic diagrams.
progeCAD Smart! free DWG CAD
AutoCAD functionality for free personal use. Edit files from almost any version of AutoCAD, as well as DXF. Similar icons, commands and interface.
Creo Elements/Direct Modeling Express
Creo Elements/Direct Modeling Express is a popular 3D CAD choice for leaders in product design who have short design cycles and frequent one-off designs. Its speed, flexibility and responsiveness to change also make it the ideal tool for short-series production runs. Download this free 3D CAD software and create assemblies with up to 60 unique parts. Use it as long as you like. Once youíve registered and downloaded the software, itís yours to use indefinitely.
VizUp 1.8 (last freeware version)
Many of the models that you create with the help of 3D modeling tools, as well as some models converted from CAD software can be very complex. These models may consist of hundreds of thousands, even millions of polygons and are practically useless for processing in real-time visualization systems.
VIZup is an easy-to-use tool for reducing and optimizing 3D models. With the help of VIZup, you can reach the optimal balance between the necessary details level and the size of 3D models. You can also use this software to reduce the number of polygons for your 3D models used in virtual reality and real-time visualization systems.
Decreasing the size of 3D models stored on the Web lets your users and customers download them much faster. Besides, this product can also be effectively used for Level-of-Details (LOD) generation.
Download (last freeware version)