Some excellent free alternatives to FL Studio include LMMS (Linux MultiMedia Studio), Cakewalk by BandLab, and Tracktion T7. Each of these options offers a range of features suitable for music production, such as MIDI support, virtual instruments, and audio effects. LMMS is known for its user-friendly interface and ease of use, Cakewalk provides professional-grade tools for free, and Tracktion T7 is highly regarded for its flexibility and comprehensive feature set.