This has probably been asked already, but there is no search function on the mobile version of the forums(afaik).

I love the game, but hate how fast I level. I would like to request someone with know how to increase xp needed for leveling, or lower xp gained through using skills, to make leveling slower. Also, perhaps make master diffuculty harder through increasing npc strength, raise their awareness to stealth, increase health slightly, an maybe give them more potions to use. Anything really!

Pretty easy mod to make, someone will propably make it as soon as CK comes out.

I found this in the nexus for the skill leveling rate:
http://www.skyrimnexus.com/downloads/file.php?id=49
Not sure how much slower it makes them, haven't tried it. You'll likely have to wait for the CK for the other requests.