www.youversion.com provides a number of resources surrounding Bible study. Here are some of the features from the youverson.com web site:

Organize - YouVersion empowers you to organize the content that's important to you!
Share - Simply share meaningful content with anyone, anytime, anywhere.
Community - YouVersion makes it easy to connect and collaborate with others.
Contribute - With YouVersion you have the power to share your content with your closest friends, family, or anyone online!

The NIV version was also added recently. The best part of this resource is that it is completely free.