Slate has a new plugin and they say it's free to download. In an email they say;

The Monster emulates the classic "all buttons in" extreme compression sound of the vintage FET limiter hardware. The "all buttons in" effect can be pretty extreme, so we added a few very cool additional features that make this processor more versatile, more creative, and more useful.

And best of all, you can download the Virtual Mix Rack which includes The Monster by clicking the orange "Download For Free" button on the top right of this page. Your license will never expire and you read that right... The Monster is completely FREE!