Blender - Blender is the open source, cross platform suite of tools for 3D creation.
VideoScribe - Make your own whiteboard video animations with Sparkol VideoScribe – award-winning video scribing app for PC, Mac and iPad. Free trial available.
AutoCAD MEP - AutoCAD MEP software helps you draft, design, and document building systems.
TTS Sketch Maker - Create amazing whiteboard sketch videos with text-to-speech human-sounding voices in minutes!
DataCAD - DataCAD is a computer-aided design and drafting software for 2D and 3D architectural design and drafting
Doodly - Create your own doodle video in just 60 seconds