Guide to the Roth IRA - Includes Roth IRA essentials, and contribution, and rollover information.
MSN Money: Roth IRA Calculator - Helps decide whether you should convert your regular IRA into a Roth IRA, whether a Roth or regular IRA is the best choice for making future contributions, projected future value, and more.
Roth IRA Web Site - Provides technical and planning information on Roth IRAs to practitioners and consumers.
Understanding the Roth IRA - Includes a calculator to help you decide whether or not to use a Roth or traditional IRA.