Audio Damage is a company with a penchant for making unique and sonically pleasing plugins at very reasonable prices. Their latest offering is the PanStatiom which does auto -panning and tremolo as well as stereo widening effects. The PanStation is based on the Drawmer M500 and Audio & Design's PanScan ( which I've used a great deal in the past).
Audio Damage states that they decided "to create the most sophisticated auto-panner/tremolo plug-in there is. With a feature set borrowing liberally from the M500 and the PanScan, Panstation is a complete professional toolbox of panning and tremolo effects behind an easy-to-understand and simple-to-program user interface."
• Four different panning laws, including an exact 1:1 clone of the M500 pan law.
• Ten panning waveforms, including all the waveforms present in the M500.
• Free-run, MIDI tempo sync, MIDI note trigger, MIDI note number, and CC control of panning.
• Audio trigger counting feature from the A&D PanScan.
• Easy-to-read user interface. No squinting at tiny pixel fonts.
• Relative phase control of each side, for tremolo and stereo widening effects.
• MIDI Learn for full MIDI CC control over every parameter.
Visit Audio Damage for more info and audio demos of the Panstation.
At $39 it's a no-brainer. (Audio Units and VST only. No RTAS).