#YOYO

Maybe you know kirikiri or Ren'Py if you play japanese galgame or visual novel.YOYO do that like as kirikiri or Ren'Py. And YOYO is distributed under the [GPLv3]

External Libraries used by
sfml: Simple and Fast Multimedia Library. [zlib/png license]
zlib: Zlib is a software library used for data compression.[zlib/png license]
json++: A JSON parser in C++. [MIT]
lua: A powerful, efficient, lightweight, embeddable scripting language. [MIT]