nessViewer!

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

MPlayerX is an open source project which aims to be the most powerful, beautiful, easy to use multimedia player on Mac OS X. MPlayerX is armed by FFmpeg and MPlayer, which means it could handle any media format in the world without extra plug-ins or codec packages. Additionally, MPlayerX is inspired by QuickTime Player, with a black interface and in-frame minimal controls. All of this helps users to focus on the contents, rather than software itself. »

5KPlayer is a new-style free media player for Mac OS as all-in-one HD video/music player, AirPlay streamer and free online video/music downloader. It plays 4K/5K, MKV, MP4, AVI, WMV, YouTube video, MP3 music & DVD on Mac flawlessly. 5KPlayer also supports Apple's AirPlay tech which allows you to stream media from iPad, iPhone to Mac or from Mac to Apple TV. Moreover, with 5KPlayer, you can free download video music from YouTube, FaceBook, etc

A Mac media player based on QuickTime and FFMpeg, Open source under the GPLv3 and hosted on Google Code.

qAllInOne (aka qAIO) is a free open-source software built using Qt to provide users an All-In-One media player, so it can view images, play videos and audio.

Semper Media Center (SPMC in short) is a Android-minded fork of Kodi, by the former Kodi android maintainer, Koying.

Use your Mac as optimal media center!

This program aims to be a multi-engine (Include of Perian Project) player designed for playing movies nicely for a person who likes to watch or present movies on their computer (such as the casual viewer or the video artist). This program features full screen or border-less floating windows, convenient controls for scrubbing or queuing movies, and on the fly playlist creation.

Smartly manage all your multimedia resources and automatically transcode videos for your Phone, Pad, etc.

MPlayer OSX Extended is the future of MPlayer OSX. Leveraging the power of the MPlayer and FFmpeg open source projects, MPlayer OSX Extended aims to deliver a powerful, functional and no frills video player for OSX.