Method and apparatus are disclosed for drywall banjo tools for applying joint tape. An example drywall banjo for applying joint tape includes a banjo body. The banjo body includes a panel and side walls protruding from outer edges of the panel to define a cavity that is configured to contain joint compound mud. The side walls include a first side wall that extends between an inlet and an outlet. The example disclosed drywall banjo also includes a sloped mound configured to couple to and project away from the first side wall within the cavity. The sloped mound is configured to guide the joint compound mud within the cavity toward the joint tape travelling between the inlet and the outlet to enable the joint compound mud to uniformly collect on a side of the joint tape.