Looking for recommendations for ambient, chiptune-esque music

Hi all,

I don't have a great deal of appreciation for a lot of electronic music but I find that there's something wonderful about subtle, ambient, chiptune-style music. I was hoping you guys would be able to point me in the direction of some of your favourite stuff that is similar to any of the following:

• Ben Prunty's FTL soundtrack

• Disasterpeace's music on the trailer video for the indie game Hyper Light Drifter

• I Fight Dragons Overture by I Fight Dragons

• the 'pre-drop' parts of Solar Fields' Mirror's Edge soundtrack

I do a lot of editing work and I've found that I really enjoy working while listening to music like this - especially tracks without any vocals.

Thanks guys! I'm really only scratching the surface with the above examples, but any recommendations you have of artists or tracks similar to them would be fantastic.