So far I got Orcish gear of Delphine and found out that the "felow escapee's" family, when offering you gifts, can offer you magic items at random. So thats an orcish bow and a magic ring or so right in Riverwood.
A level 8 character of mine got an Ebony Sword but that required him to win a fight with a Death Overlord which spawned at Arcwind point. I havnt confirmed it yet but im guessing you always get at least a Deathlord up there and you can even climb that mountains from the back to fight ONLY that last highest level boss. So MAYBE that is a garunteed ebony weapon but I havnt tested it to see if anything weaker (like a Scourge) has a chance to spawn in that last casket.
You could also end up killing Astrid to get her dagger with less than an hour of playtime.
Anyone know anything else I could use?

