LiveCoder is a fun tool I built almost a year ago to simulate live coding Frontend technologies for my presentations. You actually don't have to live-code, but just prepare beforehand the program, snippets of HTML, CSS and Javascript and you feed the tool with it, so you can just focus on explaining what's being coded. Simple :-)
I never really shared this tool, but I used it in a few presentations quite succesfully, so I think it could be an interesting tool to use. You have full control of the speed. You can pause and resume... An entire app can be live-coded with this. It's quite fun to watch ;-)
There is a Demo in the repo, a bit slow at the beginning but wait until the end, gets better. Hope you enjoy it and please, feedback would be very much appreciated.
Repo: https://github.com/jscriptcoder/live-coder
Fran