Scroll Depth is a fork of a scrolldepth project, that is not depended on jquery and works with Segment.io instead of Google analytics.
Information is available on the Project Page
Bug reports and code contributions are welcome.
You can use test/index.html for testing purposes (make sure to enter your segment.io ID)
If you have any questions you can find me on Twitter at @timur_carpeev.
Licensed under the MIT and GPL licenses.