Amazon Web Services Blog: Amazon RDS – Now Available in the AWS Free Usage Tier
We are now adding RDS to the AWS Free Usage Tier. New AWS customers (see the AWS Free Usage Tier FAQ for eligibility details) can use the MySQL, Oracle (BYOL licensing model), or SQL Server database engines on a Micro DB Instance for up to 750 hours per month, along with 20 GB of database storage, 10 million I/Os and 20 GB of backup storage. When you combine this new capability with the existing EC2 usage available on the Free Usage Tier, you may be to build and run a complete multi-tiered web application without spending a penny.
via Amazon Web Services Blog: Amazon RDS – Now Available in the AWS Free Usage Tier.