Add a SpeedRun Timer to OBS! Live Split Setup and Install Tutorial! - YouTube
Llanfair, the best timer for Mac ever - YouTube
GitHub - Dregu/nwsplit: Cross platform speedrun split timer made for nw.js that runs on windows, linux and mac, and also in the browser and mobile devices.
GitHub - MichaelJBerk/Splitter: A speedrunning timer for macOS