Game engines

Name 2D 3D VR Price
Unity Free up to $100,000 in sales in the last 12 months - Info
Unreal Engine Free up to $1,000,000 in sales, then 5% per sale - Info
Godot Free
GameMaker   If you want to export the game you have to pay a subscription - Info
Enigma   Free and open source clone of GameMaker
Construct   Depending on the license, personal is $99 / year - Info
Scratch     Free