MAME 32 is the windows build of the extremely popular MAME.
The latest version has been released, and a list of changes are below.
*Various internal treeview fixes [year / manufacturer] and cleanups.
*Factored out list view handling into its own module, picker.c. Auto_malloc() now used and appears to result in a speed up of the GUI game list scrolling, however at the moment it does cause slight pauses moving from one 'view' to another.
*Added ability to display games in windowed mode without their titlebar caption. Not fully functioning w/ GCC compile