Litecoin is an open-source, global payment network created by forking the Bitcoin client for a decreased average block time, increased supply, and modified consensus mechanism structure. Compared to Bitcoin, the system has faster transaction confirmation times and a public founder & development team who view Litecoin's technical implementation as an improvement to Bitcoin.
The Litecoin Wiki is the largest LTC resource on the web, with articles about mining, development, and more.
Litecoin vs. Bitcoin
This article discusses the similarities and differences between two oftenly compared cryptocurrencies - LTC & BTC.