The resources page should include links for multiple platforms, not just Windows. Here are some options for OS X:

Streaming

http://cocoasplit.com http://camtwiststudio.com https://github.com/jp9000/obs-studio

Timers

http://jenmaarai.com/llanfair https://forum.speeddemosarchive.com/post/timerstopwatch_program_262.html#timerstopwatch_program_262 https://github.com/Shuyinsama/Splitr

Video Player: VLC media Player：http://www.videolan.org/ Macgo Mac Blu-ray Player: http://www.macblurayplayer.com/features.htm

Video Capture

https://www.ffmpeg.org http://www.telestream.net/screenflow/overview.htm http://syphon.v002.info/recorder/