Phaser Pedals & Flanger Pedals
Phaser pedals and flanger pedals will give your electric guitar a fuller sound.
Phaser pedals, or phase shifters, work by creating a series of filter peaks and modulating their center frequencies.
(Vibe pedals will give you a similar sound to a phaser pedal.)
Flanger effects pedal doubles your guitar signal and plays both back together.
Macdaddy Music sells a variety of phaser and flanger pedals from brands such as Electro-Harmonix, Keeley, Source Audio, and Dunlop/MXR.