The best replacement for tweener is stroker.

The best alternatives to tweener are rated as following:
★★★★★  stroker
★★★  tweenlite
★★★  cranker

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

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



Google Trends

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tweener
stroker
tweenlite