Our friends at onOne have put together a little Halloween present for us. OK, so it's probably not for Halloween, but it is free. Those of us who use Lightroom will appreciate the 190 presets that help you to "correct color and tone" and "easily add creative effects".
Even if you want complete control over the image development process, these presets offer at least a decent starting point.
Go bag it!
Adobe Lightroom Presets - onOne Software