SMPlayer is a complete media player for Windows and Linux. It uses MPlayer as a playback engine, which is capable of playing most video and audio formats (AVI, mkv, WMV, MP4, MPEG, etc.). It can also play and download YouTube videos. One of the most interesting features is that it remembers the settings of all files you play. So if you start to watch a movie but have to leave, 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, etc.
WOMP! is a micro Linux distribution on a bootable CD that takes up 13 to 18MB depending on the selected options. It does not install anything on the computer's hard drive, automatically detects your sound card, network card (including PCMCIA), Conexant soft modem (present on most notebooks), or PCMCIA modem. After booting it allows you to play movie and audio files, as well as browse image files on CDs or the local hard drive. It can also play DVDs, VCDs, and audio CDs, and browse the Web over the LAN or using PPP. It can be configured to automatically play content after booting.
VLC media player is a multimedia player, framework, streamer, and encoder. It can play inputs like files, network streams, DVDs, audio CDs, Blu-Rays, capture devices, and screens. It can play most audio and video codecs and formats (MPEG 1/2/4, H264, VC-1, DivX, WMV, Vorbis, AC3, AAC, MKV, etc.), but can also be used to convert to different formats and/or send streams through the network.