The Internet offers several valuable sources of information about fellowships for graduate study.
Searchable Financial Aid Databases
Although these may be more oriented toward undergraduate financial aid, they also include graduate funding sources.
University-Based Search Sites
Several research universities offer extensive information about fellowships. Although some of the fellowships are limited to students at that particular university, other fellowships may be applied for by students from any college or university. In some cases, fellowships are organized according to field of study or types of student (e.g., women, minorities, disabled, international).