The Imperial patrol transport is a different colored version of the Republic police helicopter from Star Wars: The Clone Wars (2008).
Sabine's Undicur-class Jumpspeeder is based on early concepts for the speeder bike created for Star Wars: Episode VI - Return of the Jedi (1983). The speeder was earlier seen in the Mortis arc of Star Wars: The Clone Wars (2008).
The Computer spike that Chopper uses was first introduced in a 1990 role playing game supplement titled "Cracken's Rebel Field Guide".
Governor Tarkin's Imperial I-Class Star Destroyer is called the "Sovereign".
The Aurebesh text visible during the Probe Droid's point of view translates to "playback".