I recently installed SideKick at the recommendations of one of the sales reps that is also an excellent prospector. While it is catered towards prospectors, sales engineers can use this as well. Let's start of with the product itself. SideKick's vision is to facilitate the business development by turning this:
and they do this in a number of ways. See this blog. If I was a prospector, sign me up. Up to 200 notifications/mo is free and the first month is all you can consume.
For sales engineers, there are a few uses: