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Some Nikon Coolpix cameras which are not advertised as supporting a RAW format can actually produce usable raw files if switched to a maintenance mode. Note that switching to this mode can invalidate a camera's guarantee. Nikon models with this capability:
E700, E800, E880, E900, E950, E990, E995, E2100, E2500, E3700, E4300, E4500.
Some Canon PowerShot cameras with DiGiC II and certain DiGiC III image processors which are not advertised as supporting a RAW format can actually produce usable raw files with an unofficial open-source firmware add-on by some users
The Nokia N900 mobile phone has an add on app "Fcam", which allows capture and saving of RAW files in Adobe's DNG format (along with other advanced features usually found in DSLRs).
Read more about this topic: List Of Cameras Supporting A Raw Format