◊ Buffer Override, EQ Sync, Scrubby, and Skidder have tempo sync features
† Buffer Override, Geometer, MIDI Gater, Rez Synth, Scrubby, Skidder, and Transverb are effects that process audio and MIDI
§ Turntablist is an "instrument" plugin
* = free

We do not maintain this list with much diligence.
You may find the software search tool at KVR Audio to be more useful.