A whole bunch of older GM small and mid-size cars 1995-2010 using the light-duty 4T40E and 4T45E automatic transmission. Applications included Chevy Cavalier, Cobalt, HHR and Malibu, Pontiac Sunfire, G6 and GrandAm, Olds Alero and Cutlass, Saturn L-series, Vue and greenline Ion.
Since 2008, probably a lot of GM cars using the 6T30/35/40E: Cruze, Malibu, Equinox, Terrain, Regal, Aveo, Sonic, Encore.
Not all models in these model lines will have these transmissions, as heavier or more powerful front drive GM vehicles may have medium-duty or heavy-duty automatics from different transmission families. So when looking at models over 4000-4500 pounds GVWR, or even lighter ones with high-performance engines, be careful about identifying the transmission used, and check the owner's manual.
Even earlier, Saturn S models with the Saturn-made automatic are towable.
A lot of recent Ford compact and mid-size cars and SUVs are towable, but I've not sought out specific models. Ford is using a variant (6F35) of GM's 6T40E transmission family, but they've also used a number of other 6-speed automatics from Mazda, Aisin, ZF and others of their own design that don't all share towability with the 6F35.
Most front wheel drive compacts with manual transmissions are towable with some restrictions.
Tom Test
Itasca Spirit 29B