Entity Render Distance Extender
What this mod does is pretty simple; All it does is it gives a config option to extend from how far away entities render and from how far away they are tracked - both of which are hardcorded in vanilla minecraft. Please do note: Hostile mobs will still be despawned as usual, this has nothing to do with if they're rendered.
Q: When port to version x.x.x?
A: If you want to do it, go ahead.
A: Of course! No need to ask.
Q: There is a crash! / This mod doesn't work with X! / I found a bug!
A: You can always report it on the issue tracker and I'll try and take a look.