Here is some thoughts :

- Opencoin [OPC]
- Fancoin [FCN]
- Glasscoin [GCN]
- Foxcoin [FCN]
- Globalcoin [GCN]
- Warpcoin [WPN]
- Plugcoin [PGN]
- Crosscoin [CSN]
- Livecoin [LCN]
- Codecoin [CCN]
- Wirecoin [WCN]
- Cellcoin [CLN]
- Spherecoin [SRC]
- Forwardcoin [FWC]
- Vitacoin [VCN]
- Snowcoin [SWN]
- Logicoin [LGC]
- Hypocoin [HPC]
- Speedcoin [SDN]
- Railcoin [RCN]
- Punchcoin [PCN]