Vertcoin (VTC) is a cryptographic currency, similar to Bitcoin and Litecoin, with one major difference - Vertcoin believes that everyone who has personal computer should be able to join the Vertcoin network.
Vertcoin is a Litecoin Fork, that in turn is a Bitcoin Fork.
Vertcoin is also the first cryptocurrency to implement Stealth Addresses, a new technology for providing privacy on the public ledger. The block reward reduction is made every block to retarget difficulty with Kimotos Gravity Well algorithm.