Federal Reserve H.15
Published daily, the Federal Reserve Statistical Release (H.15) is a report of select interest rates including Fed Funds, Commercial Paper, CDs, Treasury Securities, Corporate Bonds and various other instruments.

SIFMA
The Securities Industry & Financial Markets Association (SIFMA) comprises more than 650 member firms of all sizes, in all financial markets in the U.S. and around the world.  SIFMA publishes The Municipal Swap Index, produced by Municipal Market Data (MMD), which is a 7-day high-grade market index comprised of tax-exempt variable rate demand obligations from MMD's extensive database.

LIBOR
Published by the British Bankers Association, the London Interbank Offered Rate Index (LIBOR) is an average of the interest rates that major international banks charge each other to borrow US dollars in the London money market.  Like the US treasury the CD indexes, LIBOR tends to move and adjust quite rapidly to changes in interest rates.  LIBOR is frequently used as the base for setting and resetting rates on floating-rate loans and securities.