I've tried googling the solution to this and have come up dry.
Does anyone know a program someone could use for themselves (for an animation portfolio) that is similar to the League model viewer?

I need something where you can select from a dropdown of your own characters and their different animations that would just loop the animation.

To be more specific I'm looking for something exactly like http://www.lolking.net/models where we could use the models he made as opposed to the league ones and obviously the animations he has for his own models.

I don't know where you can get one, but I know that the LoL Connect iOS app also has a model viewer, it just doesn't loop animations. It can't be THAT hard to find one or find someone to make a simple one for you.