Here's a rough explanation of all three available mods :
KMod adds a bunch of RPG-like features like giving the ability for Ellen and the monsters to speak, adding some debuffs if Ellen gets creampied by a monster, adding some sex mechanics like making it harder to escape the grasp of a monster or giving Ellen states of arousal (
the more aroused she is, the harder it gets to escape from a monster), etc... I'd recommend checking Kwanlier's post on it, it's already very detailed.
HornyEve adds a bunch of sex-related features that may help you survive longer. Escaping a sex scene will damage the monster that grabbed Ellen, letting that monster cum can also heal her and damages the monster more than if Ellen escaped and you can even force scenes with monsters. Additionally,
HornyEve adds a difficulty option that debuffs Ellen if she does receive healing from monsters (but this is optional).
KMod's post offers you multiple versions, one featuring only KMod, another featuring KMod with HornyEve included, etc... just look at the post to see which version of the mod you want to download.
BonedMod supposedly makes the game much harder but I never got to try it so you might get more information from the actual post.
P.S: BonedMod and KMod are incompatible. You'll need to pick one or the other.
I also have no clue about the controller mod but from the looks of it, it just makes it possible to play AQE with a controller (which isn't well handled natively).
There are also some retexture mods that have been released on the thread but nothing much besides a brown hair Ellen mod. I'm currently working on my own retexture mod but it's gonna be a few days before I can release it.