Betsy Palmer cries foul over new Friday The 13th.

From Shock Till You Drop:

The woman whose on-screen killing spree would kick off over twenty-five years of Jason Voorhees films, Betsy Palmer (Mrs. Voorhees to you, punk), is speaking out on the new Friday the 13th which opens in theaters February 13th. And what she has to say isn't surprising.

Rapin' Jason: The Friday The 13th clones.

So, in the 1980's a lot of people made a lot of money on taking the Friday The 13th formula and applying it to their script. Most of these "homages" ended up being pretty good and unique in their own way. Then, it seems like in the 1990's and 2000's a lot of movies took that formula and then some- pretty much cloning Jason himself. Here's a few that are actually tolerable in their own way.