There’s more than a handful out there for sure, but here is a list of 5 very nice (and free) apps that are certainly worth checking out. (Know of another good one? Comment below!)

1. iSwim
Built by thinkorswim, iSwim is a full featured stock trading platform, straight on your iPhone or iPod Touch. It allows to trade stocks, options, futures, and even features some metrics to help analyze risk and performance.

2. Bloomberg
The Bloomberg app is packed with news from around the world, headlines, quotes, charts and tools to analyze the markets and customize the information according to your needs.

3. iTrade
iTrade is a stock trading simulator. A perfect way to gain experience without having to sacrifice money! With up to date quotes, news, and a community of users, iTrade is a very realistic simulation, perfect for beginners and anyone wishing to test stock trading strategies.

4. Yahoo! stocks
Yahoo!’s stock application ships by default with the iPhone. It’s an intuitive, simple and easy to use app to check up quotes and updates on stocks.

5. DailyFinance
DailyFinance (from AOL) provides real time stock quotes, stock market news as well as a handy way to manage multiple stock portfolios. Very nice app for general purposes.

That’s it! Most stock brokers are also coming up with great apps, such as the ones from eTrade (Etrade Mobile Pro), Bank of America (Bank of America Mobile), TD Ameritrade (iStockManager) and Chase (Chase Mobile). If you’re a client of those, check their apps as well, they are worth it.