Blender
– Free and open source 3D creation suite. Supporting the entirety of the 3D pipeline—modeling, rigging, animation, simulation, rendering, compositing and motion tracking, even video editing and game creation. (Also available on Steam)
GIMP
– A freely distributed program for such tasks as photo retouching, image composition and image authoring.
OBSProject
– Free and open source software for video recording and live streaming.