[SEARCH] Mods that use skyrim's relationship ranks

[Karkhel]

I know of mods that increase or decrease it, but how many mods actually use the value for anything? I think M.C.G. (Extended Social Interactions) - Dialog Sex uses it for stuff, public whore comments has some comments locked behind low ranks. I'm interested in mods that use it rather than affect it more, as I could set something up with sexlabutil + I remember one prostitution mod having positive effect on it, but anything you can think of with regards to relationship rank being used for something. I assume I probably already have mods that do this so really I'm just asking what possible interactions people know.