sentences:  PTK Toolkit
  
  PTK is a 2D rendering engine and SDK developed by Phelios, Inc., that allows computer programmers create downloadable games in C++ that are portable to Microsoft Windows and Mac OS X.It is currently used by about 60 downloadable games  It is mainly known for powering breakaway casual hits from funpause and Big Fish Games, such as Azada, Atlantis, Atlantis Sky Patrol, Mystic Inn and Fairies.