1: A Matter of Ownership, by myotherheart
Jared has been at war, and now he's home. Jensen is the slave he buys to service him. Simple and dirty with lots of D/s.
2: To Stand Close, by arabia764
Jensen lives in a country where he is not free and slaves are commonplace. He trains girls in gymnastics, and he's so good at it that the moms band together to buy him a slave. The problem is that Jensen really disapproves of slavery, but dare not express that, because Big Brother is always wataching
3: Cinderella in Chains, by delanach
Jared is Prince Charming, and Jensen is Cinderella in this D/s version of the fairy tale. Jensen's wicked stepmother is truly evil.
4: Purity, by saucyminxfix
Jensen has been raised from birth to be a pure companion to someone who could afford one. Jared is a member of high society, and it's expected of him to take a companion.
5: Horas Non Numero, by bertee
Jensen is a slave. Jared is of the Roman nobility, and in love with him. Sadly, Jared doesn't own him, and can't afford to buy him.
6: Nomad's Slave, by anyothergirl415
Jared is a wanderer with a secret. He performs a good deed and is rewarded with the gift of a handsome green eyed slave... that he really doesn't want.
7: Things We Can’t Untie, by astrangerfate
Jensen is just going into a new job as a trainer of political prisoners. He is supposed to turn them into sex slaves for the elite. Jared is his first subject, and he begins to have second thoughts.
8: Not Equal, Yet, Together As One, by chrissy6299
The society Jared and Jensen are born into is caste based. Jensen at age 18 must choose a mate from a lower class, and Jared is his pick.
9: Comes a Horseman, by astri13
This is a J2 retelling of the Highlander arc of the same name. Jen is a gentle physician and healer, while Jarek is the leader of a barbarian horde.
10: The Courtesan Verse, by phantisma
My very favorite slavefic. Jensen is a courtesan in the house of Morgan. When Jared, who is one of Morgan's gladiators, wins an important match for him, he is rewarded with a night in the arms of Jensen. They fall in love and begin to try and win their freedom so they can be together.
11: The Winning Scenario, by virtualpersonal
Cas and brimstonegold have written a futuristic crossover between Supernatural and Battlestar Galactica. Captain Dean Winchester wins a night with Sam, a pleasure slave who has been tortured by Cylons and who has psychological problems because of that. Dean feels the need to rescue him, but that might not be a good thing...
10: Trojan Games, by tryfanstone
Not strictly a slavefic, but almost. Padakles is the Greek warrior who is beguiled by Jensen Ackleites, the Trojan prince.