This one is by Zoe Maxine, who I don't know. I just found her work doing one of my Cass Google searches, and I like it! It works equally well with Cass' Batgirl or Black Bat identities.
The mask and bat-symbol on this one are similar to some ideas I've been knocking around. The treatment of the ragged cape with contrast lining is brilliant, as is the subtle bat-outline design when she closes the seam across her chest. That's definitely one I wish I'd come up with, although I'm working up something entirely minus a cape.
Another thing I like in Maxine's design is the "sans belt" thing she has going on here. I mean, why does Cass particularly need a belt with gigantic pouches anyway? It's a pain in the ass to get the perspective on those right, and it's not as if she uses anything more than a few batarangs and a grappling hook and line. Over on Marvel World, Daredevil gets away with just a billy club device, so there's no reason Cass couldn't do the same. It's fists and feet with Cass.