Non Scam coins with ID'd DEVs:
Darkcoin
Vericoin is reversing higher with some game changing POS developments in the pipeline.
Dakcoin: a coin which loves to change the rules. Changes the rewards for mining, changes the number of total to be issued...
Vericoin: developers did a hard fork in order to roll back the chain to revert a supposed theft on MintPal.
None of these could be called scams, but they are really bad coins.
Hardforks tend to be part of the process so a change in rewards is not necessarily a bad thing.
In the case of Vericoin, I'm pretty sure they got fucked by Mintpal although that is debatable. I read somewhere the VeriCoin devs had huge regrets afterwards because it divided the Community and ultimately did a lot of damage but they were in a bind and had to do something otherwise there may have been 30% of the Coins floating around of other peoples Coins which they would lose and would crash the price for everyone else.