Just want to stay on topic by mentioning another Ripper-esque thriller: the 1996 Italian thriller "The Stendhal Syndrome," about a female police officer who is attacked by a prostitute-murdering serial rapist-strangler in Italy. This is the trailer, and a Blu-ray with newly restore picture just came out in the US. The killer is played by German actor Thomas Kretschmann, perhaps best known in the US as the Nazi officer who saves Adrien Brody's life in "The Pianist."
I just re-watched the "Scream" films, and noticed once again the killers' predilection for throat-cutting and "seeing the inside" of victims, which is very Ripper-esque to say the last. These are probably the most Ripper-esque films without actually using the JTR name nor referencing JTR anywhere. The killers all wear dark, cloak-like garment and they all have "mother issues" in one way or another. One killer is named Jill (Jill the Ripper?).