I was trawling Kickstarter again and came across another project supporting Pathfinder (this time both 1e and 2e): Lugon: Evolution & Magic.
It's a setting book that's adding some new races, classes, and spells, apparently with a focus on how magic interacts with or is derived from the ecosphere.
It has currently met its base funding goal, but it doesn't seem to have as much momentum as some of the other projects I've highlighted. Some of the stretch goals include extra spells, and "Mage guilds", which -- to my ear, at least -- sounds like some extra Wizard schools, something I know many Wizard players feel the game could use post-remaster.