The Bankrate and NerdWallet websites both publish up-to-date listings of bank certificate of deposit interest rates, as of 2015. Both sites allow users to search for optimum interest rates based on the minimum deposit required and the term of the deposit.
Bankrate lists the highest CD interest rates nationally and provides the annual percentage yield and interest rate for each bank. The site also provides a compound interest calculator and an explanation of terms associated with CD investments.
NerdWallet explains the basics regarding CD investments. In addition, the site lists tips for finding high CD interest rates, including looking for promotional rates and bumping up an interest rate during a CD's term.