One thing I've done on ancestry.com is to list the names of slaves owned by family members in the story section of the individual on the site, so that people who have matches with my family can find them.
My family owned few slaves, but there are first names listed in an inventory for the probated will of a great, great grandfather. I also list the online source where the names can be found.
One of my husband's family owned more slaves and also died before 1865, so there's an inventory with a list of first names, sometimes a notation of couples and of mothers and children. I've listed all those in a story with the link.
A distant cousin of my husband's family gave an interview in which she listed all kinds of names and occupations of slaves on the family plantation as a child. Because the relationship to husband's family is sort of confusing, we just gave her a small separate family tree with the story attached and the names of her immediate ancestors who were the slave owners.