Free asset for the Unity Asset Store that replaces the NetworkTransform with a frame based, bitstream reader/writer for syncing transforms. Uses a circular buffer of frames for each synced object. This allows for smooth movement even in lossy and jittery internet conditions.
The framework also allows for additional add-ons (which I will have for sale on the store), such as Rewind, Child Element Transform Sync, and Animator Sync.
Network Sync Transform on the Unity Asset Store
Video of the sync in action: