Quick Reference:
Logo
Name
Type: What this engine is best for
Language: What programming language it uses
Exports: What platform it can export to
BYOND
Type: 2D Multiplayer Based
Language: Dream Maker
CryEngine
Type: 3D Based
Language: Lua
Doom Engine
Type: DOOM Clone Based
Language: C
Godot
Language: C#, C++, GDScript
Inform
Type: Text Based
Language: Inform 7
Quest
Language: Quest and Javascript
Scratch
Type: 2D Based
Language: Scratch
Stencyl
Type: 2D Engine
Language: VPL
Exports: Web
Twine
Unity
Language: C#, Javascript, UnityScript
Unreal Engine
Language: UnrealScript
WOLF RPG Editor engine
Type: RPG Based
AppGameKit
Language: BASIC
Exports: Android, Linux, Mac, Windows
Construct 2
Language: Javascript
Construct 3
Language: VPL, HTML, and Javascript
GameMaker
Language: GML
Exports: Android, HTML5, Linux, Mac, Windows
GameSalad
Leadwerks
Language: Lua and C++
RPG Maker MV
RPGMaker VX Ace
Language: Ruby
Blender
Free
Cinema 4D
$$$
Maya
Silo
GIMP
Inkscape
Paint.NET
PD Howler
Aseprite
Piskel