MPlayer!

MPC-HC is an extremely light-weight, open source media player for Windows.

Potplayer is a minimalist media player that has an extensive range of configurable options to choose from and lots of functionality.

MPV is an audio and movie player based on MPlayer and mplayer2. It supports a wide variety of video file formats, audio and video codecs, and subtitle types. It shares some features with the former projects while introducing many more.

SMPlayer intends to be a complete front-end for MPlayer, from basic features like playing videos, DVDs, and VCDs to more advanced features like support for MPlayer filters and more. SMPlayer remembers the settings of all files you play. So you start to watch a movie but you have to leave... dont worry, when you open that movie again it will resume at the same point you left it, and with the same settings: audio track, subtitles, volume...

Media Player Classic was designed to look just like Windows Media Player 6.4, but with many additional new features. It has a built in DVD player with real-time zoom, support for AVI subtitles, QuickTime and RealVideo support and built-in MPEG2/SVCD/DVD codec.

MX Player - The best way to enjoy your movies.

The KMPlayer is a versatile media player which can cover various types of container format such as TS (also from Technisat Digicorder), VCD, DVD, AVI, MKV, Ogg Theora, OGM, 3GP, MPEG-1/2/4, WMV, RealMedia, and QuickTime among others. It handles a wide range of subtitles and allows you to capture audio, video, and screenshots in many ways. For playing TS-movies from the Technisat Digicorder you need the KMPlayer.

Play your music and videos. Stay entertained and up to date with podcasts and video podcasts. Discover new music with Last.fm radio. Sync your G1 phone, iPod, and other devices.

MPC-BE is a free and open source audio and video player for Windows.

The media player provided pre-installed with all modern Windows versions (7 and higher): Windows Media Player 12 plays more music and video than ever, including Flip Video and unprotected songs from your iTunes library! Organize your digital media collection, sync digital media files to a portable device, shop online for digital media content, and more.

GOM Media Player (Gretech Online Movie Player) is a freeware media player. Key strengths are the ability to play the majority of media files without the need to obtain a codec, and the ability to play some broken media files, both advantages over traditional players, like Windows Media Player. GOM Player supports file formats such as AVI, DAT, MPEG, DivX, XviD, WMV, ASF.

Use Quicktime to watch Internet video, HD movie trailers, or personal media clips.

UMPlayer is a movie player which runs on many systems. It plays most MPEG/VOB, AVI, Ogg/OGM, VIVO, ASF/WMA/WMV, QT/MOV/MP4, RealMedia, Matroska, NUT, NuppelVideo, FLI, YUV4MPEG, FILM, RoQ, PVA files, supported by many native, XAnim, and Win32 DLL codecs. You can watch VideoCD, SVCD, DVD, 3ivx, DivX 3/4/5, WMV and even H.264 movies.