The best replacement for vsync is vsync.

The best alternatives to vsync are rated as following:
★★★★★  vsync
★★★★  fps cap
★★★  fps limiter
★★★  max fps
★★  vblank
★  frame limiter

Your alternative for vsync is not listed? Suggest!
Speaking about vsync, one probably shouldn't forget about input lag.

Other search terms related to vsync and their ratings are:
★★★★★ input lag
★★★★ triple buffering
★★★★ mouse lag
★★ 120hz
You have in mind a companion for vsync and it is not yet here? Propose!



Google Trends

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