I have looked at the Raplets a bit but I wanted to make something that was a little easier to setup and would allow for further customization in the future.

Think automatic labels for your customers on the Enterprise plan, or a quick way to find all past emails from the user who wrote the email you are currently viewing.

I know a lot of this can be achieved in Gmail through filters, searches, etc, but I am aspiring for something a little more immediate and non-tech friendly. So far our private beta users have loved it and most of them are not insanely technical.