You should use the search function here, there are plenty of cab sim and headphone amp options.
The cab sim feature can be taken in a ton of different directions depending on what sounds you're looking for.. there are dozens of options that are rooted in classic amp sounds, modern amp sounds, circuits with tubes, etc.
Re: the headphone amp, check out MAO's JamMix:
http://guitar-fx-layouts.42897.x6.nabble.com/JamMix-Headphones-Practice-Play-Along-Amp-td26681.html;cid=1464660835266-742#a28573 ..this is a pretty full-featured headphone amp with a bunch of stereo options.