The Line 6 Bass pod XT Live Multi Effect is a great pedal for the bassist that is looking for something else than the vanilla bass sound. The pedal combines the reliable Line 6 quality with an enormous range of different sounds.
One of the effects out of the golden Ibanez years, the Ibanez PUE5 Multi Effect. This is a fairly rare analog multi-effect from Ibanez. With a built-in chorus, compressor, distortion digital delay, external effects loop, tuner out, headphone line out, and stereo outputs - you'd have to really try to find a classic tone not accessible through this pedal.
Are you looking for effects pedals but you find it hard to know where to begin? Than the Aria Pro II APE-4 might be the solution for you.
De Fostex DE-1 Dual Multi Effect Processor (Adapter included) is a recommended effect for the beginning/slightly experienced mixer. Some of the settings are pre-programmed, which makes this effect a safe but strong choice.