This mod allows you to create scripts in PAWN for the San Andreas singleplayer game.
It has also support for loading AMX plugins (dlls) made in C++ and normal DLL's (not for AMX).
It has around 500 native functions and uses the MTA Core.
This mod is actively developed and more features, fixes and improvements come with each day.
Instructions are included in the archive.
This mod is Open-Source (GNU GPL), you can edit it in any way you like, or contribute to it.