Includes 2D & 3D features, ZWCAD Pro offers 3D Modeling and Editing, 3D surface commands & VBA development environment. If you are looking for a full featured CAD package, ZWCAD Pro is your right choice.

ZWCAD’s native file format is DWG, so it can open, edit and save any existing DWG file saved in numerous versions, including DWG Version from 2.5 to 2007, without conversions or data loss. ZWCAD provides high degree of compatibility with AutoCAD®.

SynaptiCAD: Timing diagram editors and Verilog VHDL verification tools
SynaptiCAD was founded by electrical engineers to create design tools that helped engineers think critically about their designs. Being engineers themselves, they were frustrated by having to almost complete a design before being able to get simulation results. Our founders decided that there must be a better approach for interacting with design tools and from this simple idea they created SynaptiCAD, a company that creates "tools for the thinking mind". This idea permeates all of our tool interfaces. With SynaptiCAD's tools you are able to begin analyzing and simulating design ideas right away without having to complete an entire circuit model or schematic. Our tools automatically handle many of the minor details involved in the design effort, leaving you more time to focus on the bigger picture.