To be honest, I kind of stopped following the new editions. I vaguely remember 5th Edition coming out, and now suddenly they're talking about 8th Edition coming early next year. And my primary opponent and I have been playing WarpStrike
instead, which is skirmish rules, so I've had no need to stat up things like Wraithknights and Grey Knight Giant-Strider-Dreadnought-Thingies - Dreadknights, I think they're called - and other such monstrous-sized units. So I don't have rules for anything newer than 3rd Edition. Possibly 4th.
I've got a Tau Codex, with units up to Commander Shadowsun. Old-style Broadsides, and no riptides. I think I have vehicles up through the Sky Ray.
I've got a Dark Eldar codex with units up through 3rd Edition, I believe.
My Chaos codex has Raptors, Obliterators, and the Defiler datafax.
I do have a codex for Grey Knights.
Tyranids I have rules for Tyrant Guard, Raveners, and the Red Terror, but not Trygons or anything new since then.
Panthers Chapter Imperial Space MarinesWarpstrike:
40k Skirmish Campaign rules (Necromunda for 40k)-Updated 2016-06-21