Here are the exchange rate of multiple Crypto-Currencies
AltCoins.com (http://altcoins.com/)
Crypto Currency Prices
http://www.cryptocoincharts.info (http://www.cryptocoincharts.info)
More Infos on LTC (LiteCoins)
LiteCoins on Github (https://github.com/litecoin-project/litecoin/downloads)
CGMiner Software to produce own Crypto-Currencies (BE warned - makes only sense with dedicated Hardware)
CGMiner Software (http://ck.kolivas.org/apps/cgminer/)
Buy and Sell BitCoins:
BitCoin-Market (https://www.bitcoin.de/de/r/z684sq)