I believe that patented Apple end-of-scroll indicator is commonly called rubber banding. Some alternatives that I've seen on Android are
1) the final edge, the end of the virtual document, glows when you try to scroll past it.
2) the final page, beyond which cannot be accessed (because there's nothing there), tilts slightly. Your effort to push (scroll) past the last page tilts tilts the last page. This only fits well with a page scrolling model.
Neither of these indicators are as nice as iOS's rubber banding. They don't have the physical-realistic feel nor as clear a meaning as rubber banding. I think these alternative indicators would be helped by being augmented with both an audio "tick" and a short, sharp vibration (but both of those might have noticeable effect on battery consumption).