The best replacement for webkit is gecko.

The best alternatives to webkit are rated as following:

Your alternative for webkit is not listed? Suggest!

Speaking about webkit, one probably shouldn't forget about qt.

Other search terms related to webkit and their ratings are:

★★★★★	qt
★★★	safari

You have in mind a companion for webkit and it is not yet here? Propose!

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

webkit

gecko

moz