If you think about becoming a trader and looking for a good Forex Broker pay attention at those having the lowest or even Zero Spread. Spread is difference between a bid price and an ask price. This difference is a Broker actual commission. If a Broker’s spread is very high you income will be minimal no matter how good you trading strategy is. Some brokers do not offer a fixed spread. The others offer a constant spread for a given pair but usually it is higher than a variable spread. Some Brokers have Zero Spread for some pairs, but  make comission charge for trading those.
Here is the list of Forex Brokers offering Zero Spread Account

Alpari
http://www.alpari-forex.com
Works from: 1998
Country: Russian Federation
Margin: 1:500  Spread: 2 points
Forex: 300  Forex mini: 200

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Supported language: Arabic, Chinese, English, French, Russian, Spanish
Demo account: unlimited
Market: CFD, Commodities, Forex
Platform: Alpari Direct, MetaTrader 4, MetaTrader 5, Systematic
Account funding: Bank Transfer, Credit Card, MoneyBookers, QIWI, RBKMoney, WebMoney, WIRE Transfer
E-Global Trade
http://www.eglobal-forex.com
Works from: 2007
Country: Virgin Island British
Margin: 1:500  Spread: 2 points
Forex: 2000  Forex mini: 20

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Supported language: English
Demo account: unlimited
Market: CFD, Forex, Futures
Platform: MetaTrader 4
Account funding: WebMoney, Bank Transfer, Credit Card, Liberty Reserve
FXCompany
http://www.fxcompany.net
Works from: 2004
Country: Russian Federation
Margin: 1:500  Spread: 0.5 points
Forex: 0  Forex mini: 100

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Supported language: Chinese, English, Latvian, Polish, Russian, Ukrainian
Demo account: 30 days
Market: CFD, Commodities, Forex, Futures, Indices
Platform: MetaTrader 4
Account funding: Bank Transfer, Credit Card, Liberty Reserve, MoneyBookers, PerfectMoney, WebMoney
Interactive Brokers
http://www.interactivebrokers.com
Works from: 1983
Country: United States
Margin: 1:40  Spread: 0.5 points
Forex: 25000  Forex mini: 0

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Supported language: Bulgarian, Chinese, English, French, German, India, Japanese, %{text.Netherlands}, Spanish
Demo account: unlimited
Market: Bonds, CFD, Commodities, ETFs, Forex, Futures, Options, Stocks
Platform: IB Risk Navigator, OMS Blotter, Trader Workstation (TWS), TWS Company Fundamentals, TWS ScaleTrader, Web Browser, WebTrader
Account funding: Bank Transfer
MRC Markets
http://www.mrcmarkets.ru
Works from: 2002
Country: Russian Federation
Margin: 1:500  Spread: 0.5 points
Forex: 1000  Forex mini: 5

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Supported language: Chinese, English, German, Russian
Demo account: unlimited
Market: CFD, Commodities, Forex, Indices
Platform: MetaTrader 4
Account funding: Bank Transfer, WebMoney
InstaForex
http://instaforex.com
Works from: 2007
Country: Russian Federation
Margin: 1:500  Spread: 3 points
Forex: 1  Forex mini: 0

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Supported language: English, Russian, Chinese, German, Italian, French, Turkish, Portuguese, Latvian, Indonesian, Thai, Czech
Demo account: unlimited
Market: CFD, Forex, Commodities
Platform: MetaTrader 4
Account funding: WebMoney, E-Gold, Bank Transfer