Finally! Our customers have been begging us to provide this for years. We build "Employee Engagement" (aka gamification) tools that extend various CRMs. Not all of them support a way to extend the UI but a sidebar would be perfect.
We currently have a free-floating chrome application which looks like a detached sidebar. The problem is our customers want to see it all the time and don't want it to go behind or on top of the browser. As far as I know, there's no good way to "dock" it to the side of a screen and prevent other applications from using that space.
