Wine v1.5.5 Final is released. Wine is a project to allow a PC running a Unix-like operating system and the X Window System to run x86 programs for Microsoft Windows. Alternately, those wishing to port a Windows application to a Unix-like system can compile it against the Wine libraries.

Wine v1.5.5 Final Changelog:
- Support for installing Mono as a Wine add-on package.
- Dithering of pattern brushes in the DIB engine.
- Support for installing the .NET 4.0 runtime.
- DDS files supported in D3DX9.
- Various bug fixes.

Download: Wine v1.5.5 Final
Source: Here