LexImpact uses OpenFisca and its Python API to evaluate the impact of public policy on households, thanks to an income revenue tax simulator.
https://leximpact.beta.gouv.fr/Mes Aides uses OpenFisca and its Web API to inform French citizens of their eligibility to national and local benefits.
https://mes-aides.gouv.fr/NSW Legislation Explorer
NZ
New South Wales uses OpenFisca and its Legislation Explorer to allow citizens, civil servants, policy officers and developers to explore government rules.
https://github.com/openfisca/legislation-explorer
New South Wales Government
Rapu Ture (Exploring the Rules) is a web interface to explore the rules in New Zealand's Openfisca built from government legislation, regulation and some policies.
https://nz.openfisca.org/
New Zealand Government Innovation Service Lab