Part of the decommissioned DotGNU project, Portable.NET is a free software and open source software initiative aiming to build a portable toolchain and runtime for Common Language Infrastructure applications. The project focuses on compatibility with the ECMA-334 and ECMA-335 standards and support for .NET's base class libraries, XML, and Windows Forms. the latest release of Portable.NET is 0.8.0. The project supports a number of different CPU architectures and operating systems.