Resources / Toolbox
Please note that for this list I will only consider open source licensed tools.
Video / Audio Editing
Kdenlive
Kdenlive is a powerful free and open source cross-platform video editing program made by the KDE community. Feature rich and production ready.
Operating system: Linux; Microsoft Windows 7 and higher, x86-64 only; macOS (source code only)
License: GPL-3.0-or-later
Shotcut
Shotcut is a free, open source, cross-platform video editor for Windows, Mac and Linux. Major features include support for a wide range of formats; no import required meaning native timeline editing; Blackmagic Design support for input and preview monitoring; and resolution support to 4k.
License: GPL-3.0-or-later
Developer(s): Dan Dennedy, LLC
Blender
Blender is the free and open source 3D creation suite. It supports the entirety of the 3D pipeline—modeling, rigging, animation, simulation, rendering, compositing and motion tracking, even video editing and game creation. Advanced users employ Blender’s API for Python scripting to customize the application and write specialized tools; often these are included in Blender’s future releases. Blender is well suited to individuals and small studios who benefit from its unified pipeline and responsive development process.
Operating system: Linux, macOS, Windows, FreeBSD, OpenBSD, NetBSD, DragonFly BSD, Haiku
Size: 147–220 MiB (varies by operating system)
Developer(s): Blender Foundation, community
Available in: 36 languages
Original author: Blender Foundation, Ton Roosendaal
Blender is released under the GNU General Public License (GPL, or “free software”).