Many Dahons frames are also drilled to take a Dahon front release bag simular to the brompton design and can be pushed along on there normal wheels in the folded postion if you hold the bike correctly. The later point later is true of many other folders of course ie Downtube

Other options that include transit wheels include the Mezzo/Ori that has 2 rear ones so just the front needs lifting slightly to push along.An option I use on my mezzo is to half fold it and use the front wheel as the front transit wheels ( will post a pic sometime).
Another option is the mission space genie/brezzer? that has four transit wheels and the rear bag can be left on when folded.

The Mezzo and space genie don not have front bags, but the space genie could be adapted to hold one.
Another option are the diblasi range the older R series fold on to pegs inserted in to the rack and at the front rest on the front wheel. I folds so quickly there is no point in half folding it, but one could put a caster wheel on it. The diblasi can take a front and rear bag that do not have to be removed when folded at all. Newer Diblasi R22 has four transit wheels also,I believe the bags would need removing when folded,but not sure.

I am sure there are more ,including popular DIY versions.