==Free-to-Use Assets===
>Desktop Pony sprites - Animated 2D pony sprites (non-commercial use only)
http://desktop-pony-team.deviantart.com/

>MLP Sound effects - An archive of sounds ripped from the show.
http://ukofequestria.co.uk/threads/mlp-fim-soundeffects-pack.5822/

>Open Game Art - Public use art, music, sounds, models,etc.
http://www.opengameart.org

>PONES - 2D platformer base for GameMaker Studio
https://www.mylittlegamedev.com/thread-1561.html

>KP-ShadowSquirrel's 3D Pony Models
https://kp-shadowsquirrel.deviantart.com/art/Pony-Model-Download-Center-215266264

---

==Free Game Development Engines==
>GameMaker Studio
>Free edition only allows Windows export and forces a simple 1-second long splash screen before the game starts, also disables Spine importing and SWF importing.
https://www.yoyogames.com/gamemaker

>Unity
>Personal edition requires you to not have made $100k off of a project (correct me if I'm wrong) and has a splash screen before the game starts.
http://www.unity3d.com

>Unreal Engine 4
>Entirely free, unless commercial product makes $3k per calendar quarter.
www.unreal.com

>Construct 2
>Free only allows a max of 100 events, 4 layers, no organising the project with subfolders, no event searching, etc.
https://www.scirra.com/construct2

---

==Free Programs To Make Assets==

>Blender - 3D model creator and editor
>Paid alternative(s): 3DSMax
www.blender.org

>Inkscape - Vector graphics/art tool
>Paid alternative(s): Adobe Illustrator
inkscape.org

>GIMP - Image Manipulation Program
>Paid alternative(s): Photoshop
www.gimp.org

>Piskel - Online sprite/pixel art and animation editor
>Paid alternative(s): GraphicsGale
http://www.piskelapp.com/