BMP is mainly a port of XMMS to GTK+ 2 and, as such, integrates better with the look and feel of more recent versions of GNOME, Xfce, and, if using the GTK-QT theme engine for KDE, KDE desktop environments. Like XMMS, BMP looks like Winamp and even supports Winamp and XMMS skins.
Along with the announcement of the 0.9.7.1 release, the BMP development team also announced that BMP would not be actively developed anymore. Instead, the team would spend development effort on the next generation of BMP, called BMPx. There is also a fork of classic BMP called Audacious.