Divinci Resolve Color Grading: https://www.blackmagicdesign.com/products/davinciresolve
Audacity audio recording and editing tool: http://audacity.sourceforge.net/download/
Blender video editing tool: http://www.blender.org
GIMP image processing tool: http://www.gimp.org/downloads/
Inkscape vector drawing tool: http://www.inkscape.org/en/download/
Pencil animation tool: http://www.pencil-animation.org