Render Player API 1.11.2/1.10.2 gives third party mods managed access to the player render classes.
Render Player API
Render Player API is a client API which provides access to
  • the class “RenderPlayer”
  • the class “ModelPlayer”
  • the class “ModelBiped”
while minimizing conflicts between mods.

Requires:

Minecraft Forge

How to install:

  1. Make sure you have already installed Minecraft Forge.
  2. Locate the minecraft application folder.
    • On windows open Run from the start menu, type %appdata% and click Run.
    • On mac open finder, hold down ALT and click Go then Library in the top menu bar. Open the folder Application Support and look for Minecraft.
  3. Place the mod you have just downloaded (.jar file) into the Mods folder.
  4. When you launch Minecraft and click the mods button you should now see the mod is installed.

Render Player API 1.11.2/1.10.2 Download Links:

Previous versions:
For Minecraft 1.11.2
Enhancer: Download from Server 1 – Download from Server 2