The best replacement for scrollviewer is scrollbar.

The best alternatives to scrollviewer are rated as following:
★★★★★  scrollbar
★★★★  scrollcontentpresenter
★  scrollbar wpf

Your alternative for scrollviewer is not listed? Suggest!
Speaking about scrollviewer, one probably shouldn't forget about itemscontrol.

Other search terms related to scrollviewer and their ratings are:
★★★★★ itemscontrol
★ scrollbar
You have in mind a companion for scrollviewer and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of scrollviewer in all years. Click on graph for more.
scrollviewer
scrollbar
scrollcontentpresenter