FLEUR
An all-electron FLAPW materials code with tools for electronic bands, thin films, noncollinear magnetism and spin–orbit physics.
Where it fits
Magnetic materials, thin films and all-electron electronic-structure workflows.
Limits and practical considerations
Basis parameters and magnetic configurations need systematic testing; SPEX and other companion tools have separate setup requirements.
Licensing and access
Open source under the MIT licence; check companion-program terms separately.
Official documentation and project