Free and open source video (and audio) converter with basic editing capabilities. Also allows you to download web video.
Shutter Encoder
Animation in Blender: Quick and Dirty Bouncing Ball
Introduction to Animation in Blender, resulting in a roughly animated bouncing ball.
Vertex Groups and Hooks
Introduction to Vertex Groups and Hooks in Blender, using cloth as an example.
Instruction Video.
Rigid Body Dynamics in Blender
Here is a quick introduction to using Rigid Body Dynamics in Blender
Blender Quick Start
Introduction to Blender. Covers scene navigation, adding and manipulating objects (edit mode)
Blenderkit
On Blenderkit you can find models, materials, HDRs, scenes and brushes you can use directly in Blender. Some are free, many are part of a subscription based Full Plan.
Audacity: Audio Editing and Recording
Audacity is a powerful open source audio editing program, with many high quality filters you an use to process you audio and make it sound exactly how you want it.
Available for Mac, PC and Linux
Basic Sound Editing
Converting Audio, Editing Sounds: converting downloaded audio.
Basic Sound Editing in Premiere Pro
BBC Sound Effects
The BBC Sound Effects Archive is available for personal, educational or research purposes. There are over 33,000 clips from across the world from the past 100 years.
Making a 3D Texture Stick
How to use a Texture Reference Object to make a solid texture stick