Marshall Intermediate Tax-Free (MITFX)
This fund differentiated itself from the pack in 2008 by finishing in positive territory while two-thirds of its peers lost money. Management is known for its cautious approach, and it recently diversified the fund into more holdings out of concern about credit trouble in the municipal bond market. Over the past 10 years, the fund has returned an annualized 5 percent. It yields 2.7 percent and levies annual fees of 0.55 percent.