The current list of coins copying Darkcoin or using Evan's work in some way.
You can get cheap copies, or follow the real thing

DARKCOIN is one of the few coins with a full time developer, and a developer that is open about who he really is: Evan Duffield.
While working on Darkcoin, Evan has created a number of new innovations. These are now starting to be used by other coins, including clones of Darkcoin or existing coins that are changing to adopt Darkcoin innovations.
This is a list of the the coins that are using Darkcoin innovations.
* Badgercoin - x11
* Bulgarian Crypto Coin (BGC) - x11
* CATicoin - x11
* CryptoPowers Coin - x11 and DGW
* ConspiracyCoin - x11
* Colorcoin - x11
* Edgecoin - x11
* Einsteinium Emc2 - looking to switch from Scrypt to x11
* ElectronicYen - x11
* Electronic LIRA - x11 and DGW
* Emirates Coin - x11
* EuropeCoin - x11
* GiveCoin - x11
* Global Denomination - x11
* Groestlcoin - DGW
* H20Coin - DGW
* HackCoin - x11 (PoW/PoS)
* HashCoin - X11 and DGW
* HighFiveCoin - x11 and users voted to add DGW
* Hirocoin - x11
* Frycoin - added DGW to fix problems with KGW
* Juggalocoin - x11
* Lamacoin LAMA lamaco.in - x11
* Limecoin - x11 and DGW
* Libertycoin - x11 PoS
* Logicoin X11 and DGW
* MaruCoin - DGW
* Muniti - x11
* Our Coin - x11 (Pow/PoS)
* PinkCoin - x11
* Nyancoin - switching algo to x11
* Quebecoin - x11 and DGW
* RAP(e)COIN - DGW
* Rotocoin - DGW
* SummerCoin - x11 (after vote on others)
* TwilightCoin - x11 and DGW
* VirtualCoin - x11
* WILDWESTCOIN - x11 PoS
As at 14 May 2014, the rate of new coins using x11 was starting to speed up, so I'll do what I can to keep up.
just like I believe with BC, if you have A LOT of copycats coming out after your coin has launched, then you have a legitimate entity. you guys should stand by DRK. as they say, imitation is the sincerest form of flattery lol.