I'd like to investigate the structural relaxations of the excited state for periodic systems. BSE and TDDFT are two promising methods for this purpose. While there is a discussion on forces with BSE here: Is there a software that has implemented forces of BSE calculations for solids?, I'm wondering if there is a software for forces with TDDFT.
The SIESTA code has a branch (rel-Max-2) developed by researchers from Max Plank institute that include the calculations of forces and real-time TDDFT.
The TDDFT is merged into the main development branch and will be released in versions newer than 4.1 (i.e. 4.2 or 5.0).
To download it, go to the Gitlab page: https://gitlab.com/siesta-project/siesta/-/tree/rel-MaX-2