ScrewTurn Wiki is open source (GPLv2) Wiki software that runs on the Windows ASP.NET platform. It is written in C# and by default does not require a database, though SQL Server and Mysql are supported by the use of plugins. It can be considered both a Wiki and a Personal Wiki because it also has a Desktop Edition that runs locally without the need to be installed on a web server. The user interface, thanks to many users' contributions, is available in 11 languages.