Compilation of names of nameless figures in Tanach
Just sharing a cool resource I came across yesterday: A Hebrew Wikipedia entry that lists suggested names of figures who are nameless in Tanach, along with references to many sources (e.g., the classic Avraham's mother was Amtalai bat Karnevo from the Talmud, but also Kayin's wife was Hoyah according to a list brought in Keter Aram Tzova, and so forth). Of course, they don't have everything (I've come across a few that aren't listed and I'll do my best to add them soon, once I figure out how to navigate that template), but it's still a treasure load of information.