Below are the full list of various Cryptocurrency exchange sites.
On this sites you can exchange BTC to other cryptocurrencies
1.Poloniex
2.Kraken
3.Bittrex
4.Bitfinex
5.Cex.io
6.Bitkonan
7.Tidex
8.Bit2c
9.Bitbay
10.Yonbi
11.Coinmate
12.BTCC trading fair
13.C-cex trading fair
14.Okcoin
15.BTC38
16.Bitstamp
17.Coin exchange
18.Gemini trading fair
19.Itbtc
20.Hitbtc
On this sites you can exchange BTC to other cryptocurrencies
1.Poloniex
2.Kraken
3.Bittrex
4.Bitfinex
5.Cex.io
6.Bitkonan
7.Tidex
8.Bit2c
9.Bitbay
10.Yonbi
11.Coinmate
12.BTCC trading fair
13.C-cex trading fair
14.Okcoin
15.BTC38
16.Bitstamp
17.Coin exchange
18.Gemini trading fair
19.Itbtc
20.Hitbtc