A few weeks ago I "found" a plugin I liked but I didn't download it because I didn't want to get side tracked from what I was doing at the time. Now I can't find it.
The free plug-in takes an existing kick drum sound and enhances it to make the kick drum sound massive. I think it's sort of like a kick drum style dial since I don't remember it having a lot of user controls or much of a GUI interface. It's pretty much a one trick pony but it performs it's one trick very well.
If anyone knows of an effect like that please share a link here.