Pony World is an open source MLP-FIM themed game, created by Mircea Kitsune using various content. My own contributions are licensed under GPL. Below is a list with the authors of all assets, and their individual licenses:

******** Fork:

This project is a fork of My Little Pony Open Source 3D. It contains meshes, textures, animations, and BGE logics from it. MLP-OS was made by Creator Of Pony and is licensed under CC-BY.

http://www.equestriagaming.com/2011/05/my-little-pony-3d.html

******** Sounds:

qubodup:
					Metal interactions			CC0 / PD			http://opengameart.org/content/metal-interactions
					4 dry snow steps			CC0 / PD			http://opengameart.org/content/4-dry-snow-steps
kddekadenz:
					Different steps				CC0 / PD			http://opengameart.org/content/different-steps-on-wood-stone-leaves-gravel-and-mud
Independent.nu:
					16 button clicks			CC0 / PD			http://opengameart.org/content/16-button-clicks
Bart Kelsey:
					Spell 3						GPL / CC-BY-SA		http://opengameart.org/content/spell-3
					Spell 4						GPL / CC-BY-SA		http://opengameart.org/content/spell-4
Blender Foundation:
					Birdflap					CC-BY				http://opengameart.org/content/birdflap
Xonotic Project:
					Ambience sounds				GPL					http://www.xonotic.org/

******** Music:

elerya:
					Town music					CC-BY				http://opengameart.org/content/town-music

******** Textures:

Philman401:
					Simple toon wooden crate	CC0 / PD			http://opengameart.org/content/simple-toon-wooden-crate-texture

******** Scripts:

martinsh:
					Bloom shader				CC0 / PD			http://blenderartists.org/forum/showthread.php?153325-Glowing-effect
cyborg_ar:
					Toon lines shader			GPL					http://blenderartists.org/forum/showthread.php?155137-2D-filters-Outlines-filter-%28for-toon-shaders%29