Money Market Funds

TD Ameritrade has a slew of money market funds.
    https://research.tdameritrade.com/grid/public/research/mutualfunds/families

For instance, you can find the following funds, which are pretty much risk free
SNSXX Schwab U.S. Treasury Money Fund
SNVXX Schwab Government Money Fund
SNOXX Schwab Treasury Obligations Money Fund