KiCad - A Cross Platform and Open Source Electronics Design Automation Suite
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Fritzing - Fritzing is an open-source initiative to support designers, artists, researchers and hobbyists to...
Keyshot - KeyShot 3D rendering and animation software is the fastest, easiest way to create amazing, photographic visuals of your 3D models. Enter your search in the box aboveTryYour download of KeyShot is only moments away.
LTspice - LTspice® is a high performance SPICE simulation software, schematic capture and waveform viewer with enhancements and models for easing the simulation of analog circuits.
Cinema 4D - Cinema 4D is a 3D modeling, animation, motion graphics and rendering application.