- Of the writings that can be verifiably attributed to Fulbert, the bulk consists of his letters. His most famous letter was to Duke William V of Aquitaine on the duties of feudal lord and vassal. He also wrote to fellow churchmen on a variety of liturgical issues including the appointment of bishops, excommunication, and obedience. His letters also include correspondence about mundane issues of everyday life such as thanking people for medicine and setting up meetings.
- Fulbert wrote approx. 24 poems which have been sometimes described as humorous, such as his poem about the monk in the desert, or lovely, as when describing his “Ode to the Nightingale”.
- "Chorus Novæ Jerusalem" (Ye Choirs of New Jerusalem), to be sung at Easter services.
- Most of Fulbert’s hymns were written to glorify the Virgin.
- Fulbert’s most famous sermon is “Approbate Consuetudinis”, in which he provides information regarding the importance of the celebration of the “Feast of Mary’s Nativity”.