Geist Lite is an application by FXpansion and, as the name suggests, it is a light version of a program called Geist.
Geist itself has already been discontinued and has been replaced by Geist 2. Geist Lite, on the other hand, still exists and has now been made available as a FREE download.
In this video, I talk about the interface of Geist Lite as well as some of its features. And I also discuss why you may or may not download this plugin.