Stay on top of the Bitcoin market with these helpful websites:

BitcoinWisdom: Live charts with indicators, different exchanges
Bitcoinity: Live charts and order book visualization of different exchanges
Tradingview: Live chart + indicators, different exchanges
Bitcoincharts: Live prices for different exchanges, historical price charts with indicators and order books
BTC Charts: Live order book visualization, different exchanges
Bitcoin Analytics: Live charts and order books, different exchanges (paid version)
ZeroBlock: Live charts and order books, different exchanges (paid version)
SierraChart: Live chart feed for different exchanges for SierraChart program
Cryptonica: Live order book for Bitstamp
Blockchain.info: Stats, variety of charts
Bitcoinx: Prices, various stats and charts
blockchained.com: Prices, various stats and charts
Coinsight: Historical order book sums, different exchanges

Suggestions to add more welcome.