The best replacement for flexslider is nivo slider.

The best alternatives to flexslider are rated as following:
★★★★★  nivo slider
★★★★  bootstrap carousel
★★★★  bxslider
★★  revolution slider
★  wooslider

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

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



Google Trends

Scale is based on the average worldwide traffic of flexslider in all years. Click on graph for more.
flexslider
nivo slider
bootstrap carousel