Craven Williams, president of Greensboro College since 1993, resigned Tuesday, effective immediately, The Greensboro News & Record reported. Professors, expressing concern about mounting debts at the college and their lack of information about plans to deal with financial problems, had been planning a vote of no confidence. As recently as two weeks ago, Williams indicated that he had no plans to leave. In April, Williams cut faculty and staff salaries by 20 percent.