I figured it would be a good idea to have a list of free resources for the community
If you have something to add to the list, leave a comment!

Game Engines

Godot is free and open source
Unity is free unless you make over $100k but is not open source
Unreal engine is free unless you make over $1 Million but is also not open source

Asset Creation

Blender is a powerful free and open source 3d modelling program
Krita is a free and open source art program
Gimp is a free and open source image editing program
Laigter a free program for creating normal maps
Tiled is an open-source 2D level editor.@AppelTrad@hexbear.net
LMMS a Digital Audio Workstation similar to FLStudio - @ForkedStill@hexbear.net
Inkscape a vector graphics editor (.svg and other) - @ForkedStill@hexbear.net
Paint.net a simple image editor - @ForkedStill@hexbear.net
Pixelorama a pixelart editor, fully FOSS, unlike Aseprite - @ForkedStill@hexbear.net
Material Maker as the name implies, a tool for creating materials for 3d graphics - @ForkedStill@hexbear.net
LibreSprite is a fork of the last FOSS version off Aseprite - @GrainEater@lemmygrad.ml

OpenGameArt has a huge selection of free game assets, from audio to 3d models
Assets · Kenney Great source of prototyping assets - @JoeByeThen@hexbear.net
Tiled is an open-source 2D level editor. - @AppelTrad@hexbear.net
Musical Artifacts a large selections of various soundfonts, uploaded by users - @ForkedStill@hexbear.net
FreePats a collection of specific instruments as soundfonts - @ForkedStill@hexbear.net

Freya Holmér on YouTube has several playlists of explanations of vectors, shaders, normal maps, and other useful mathematics. - @AppelTrad@hexbear.net
TinyTools Open source, experimental, and tiny tools roundup - @mechwarrior2@hexbear.net
VSCodium a very popular code editor, with Microsoft telemetry ripped out - @ForkedStill@hexbear.net
Notepad++ a lightweight code editor for Windows - @ForkedStill@hexbear.net
Audacity a very useful tool for sound recording and editing - @ForkedStill@hexbear.net
MuseScore an app for music sheet notation - @ForkedStill@hexbear.net
OBS a program for screen recording - @ForkedStill@hexbear.net