I have these:
Amazon.com: Shimano 2014 Men's Recreational Cycling Shoes - SH-CT70G (Grey/Orange - 46): Shoes

SPD, but they come with covers on the bottom of the soles that cover the cleat area so you can use them without cleats.

The purpose of the cover is to use them with SPD pedals for "placement" but without clipping.

They are designed for commuter types and have a pretty flexible sole. Mostly got them so I could ride my bike to BART with clipless shoes and then not slip off the stairs while carrying my fully loaded bike

They are part of the Click'r line of pedals/shoes which are supposed to be targeted towards commuters. Pedals are platforms with a SPD clip on each side and super low tension (lower than reg SPD pedals so you can bail easier if some idiot stops in front of you) and reflectors if it matters.

Haven't tried other options out there as these are my first and only pair of cycling shoes. If you're thinking about walking a little bit in them though, you will probably for sure want to go SPD because it has a recessed cleat. This allows you to walk on the shoe and not on the cleat itself which can be dangerous (slippery) if your not careful.