At the beginning it is very hard to grasp how many tools are available for us for trading.
There are companies that provide news. For example, CNBC television is one of the most widely watched by traders.
There are companies that provide excellent tools for technical analysis. See picture of http://www.amibroker.com/.
The above website also list some of the most well-known financial market information providers like http://www.esignal.com/. Data feeds can be ordered and plugged into various analyses software.
Finally, we need a broker companies where we can place our orders. Most brokers - naturally - provide real-time data feeds, some sort of charting software for technical analyses and lots of time they provide some news feed. However, it is better not to rely on the tools of the brokers. Professionals rarely do that.
All above tools and how to choose them are discussed in detail in the other essays.