The MRSF approach to TDDFT has emerged recently as an alternative way to eliminate spin contamination in SF-TDDFT, if not rigorously and exactly (as in SA-SF-TDDFT) then at least to good numerical accuracy, without significantly increasing the complexity with respect to the original method SF-TDDFT method. In Section 3.2.1, we briefly explain how MRSF-TDDFT works in the case where states of singlet multiplicity are targeted starting from a triplet reference state, and then a few exemplary applications are discussed in Section 3.2.2.