Foundry 0.6.5 - 0.7.x compatible ONLY, and replaced by Fate Core Official (https://github.com/Sk1mble/fate-core-official/)
A customizable system for Fate Core which supports arbitrary skills/stress tracks/conditions/aspects and other modular characteristics that will allow GMs to build almost any implementation of the Fate Core system. Includes default settings for Fate Core, Fate Condensed, Dresden Files Accelerated, and Fate Accelerated.
This system has been transitioned to Fate Core Official (https://github.com/Sk1mble/fate-core-official/) and will not be developed any further as Modular Fate.
If you are currently running a world in Modular Fate and would like to port over to Fate Core Official, that is possible. You will need to update to the beta 0.8.3 release of Foundry though, meaning that some modules won't work or will be unstable (for now).
1) Back up your world and install the Fate Core Official system from the system browser
2) Edit the world's world.json so that the system line shows "fate-core-official"
3) Reboot into your world. If everything went according to plan, all of your existing actors and settings will have been migrated without any further work needed!