Nice, clean media player that supports most formats MooPlayer was designed to replace Windows Media Player 6 (mplayer2).
It uses a similar style where the player is only the actual video, menu and window frame. It is DirectShow based which means it supports all formats that Windows Media Player does (MPEG, DivX, XviD, etc.).
The interface is meant to be as minimal as possible.
All controls are overlayed on the video so you can easily access them even in full screen mode. This also means they don't clutter up the view as much. It is released under the GPL and source is available for all releases.
System requirements
Windows 2000/XP (Runs on 98/ME but don't exepect much support)
500MHz CPU
DirectX 9
Graphics card with full support for VMR-9 (DX9 component) and textures of any size