TOP NOTCH (AND 100% FREE) GAME DEVELOPMENT RESOURCES
Audacity
Audacity is an open source, easy-to-use, multi-track audio editor and recorder for Windows, macOS, GNU/Linux and other operating systems. Developed by a group of volunteers as open source.
Bfxr
Bfxr is an elaboration of the glorious Sfxr, the program of choice for many people looking to make sound effects for computer games. Bfxr has moved in the direction of increased complexity and range of expression. All the buttons that you know and love are here, but there are some new things as well:
Blender
Blender is a free and open source 3D creation suite. It supports the entirety of the 3D pipeline—modeling, rigging, animation, simulation, rendering, compositing and motion tracking, video editing and 2D animation pipeline.
Bosca Ceoil
Bosca Ceoil is a very easy to use and open source program to make music with. If creating 8-Bit tracks interests you, give this a try!
GIMP
GIMP is a cross-platform image editor available for GNU/Linux, OS X, Windows and more operating systems. It is free software, you can change its source code and distribute your changes.
Godot Engine
Godot provides a huge set of common tools, so you can just focus on making your game without reinventing the wheel. It is completely free and open-source under the very permissive MIT license. No strings attached, no royalties, nothing. Your game is yours, down to the last line of engine code.
OBS Studio
Free and open source software for video recording and live streaming. Download and start streaming quickly and easily on Windows, Mac or Linux.
Unity 3D
The world’s leading platform for creating and operating interactive, real-time 3D (RT3D) content. They empower creators. Across industries and around the world.