Windows Zoomit like tool from mac I have been using zoomit on windows. With that tool: I can write on screen, zoom screen, draw shapes on screen while doing presentation. Also, I can run a stopwatch for break during presentation. Blacken, whiten the screen. Is there such kind of tool for Mac? I saw zoomit for mac and its absolutely rubbish which only zooms and doesn't nothing extra like window's zoomit. 

https://technet.microsoft.com/en-us/sysinternals/bb897434.aspx
There's a great app on Apple Store named "Draw on My Screen EZ". Link to app