Here’s some of the software I like to use to make my video, pictures, graphs, etc.
Desmos.com – online, free graphing calculator (with slider capability!)
Geogebra – interactive math investigation software
Inkscape – Diagrams, SVG Graphics Editor (free)
Gnu Image Manipulation Program (Gimp) (free)
DVD Shrink (free)
Microsoft Mathematics – Downloadable graphing calculator, equation editor (free)
Google Sketch-Up – 3-D rendering program (free)
emergent math 