Namecoin was one of the first generation of altcoins. It allows you to register .BIT domain names. Registering a domain costs 0.01NMC, and for a further 0.01NMC ownership will be yours for the next 36,000 blocks. It is possible to make money from cybersquatting on Namecoin.

Blockstack was developed on the Namecoin blockchain.

RECOMMENDED WEBSITES & WEBLOGS
Namecoin Explorer
PeerName