The Powered by the Apocalypse (PbtA) system for Foundry VTT is a generic system that is built as a framework to allow you to build out character sheets for most systems that would be considered PbtA, assuming they include playbooks, character advancement, and a 2d6 (or similar, such as 2d10 or d6+d8) core mechanic that revolves around ranges of success.
Head over to the documentation at https://asacolips.gitbook.io/pbta-system/ for a tutorial on how to build your own sheets for the PbtA RPG of your choice using this system.
Because this system is a general purpose framework, it does not include any compendium content or licensed material. More information on Vincent Baker's Powered by the Apocalypse policy can be found here: http://apocalypse-world.com/pbta/policy
The system's code is licensed using the MIT license, which can be found here: https://gitlab.com/asacolips-projects/foundry-mods/pbta/-/raw/master/LICENSE.txt