Deepthi Goguri shares a list of useful tools for SQL Server work, presentations, and recordings:
1. OBS Studio: This is a free and open source software for video recording and live streaming. I mostly prerecord my sessions using OBS. I personally love this tool as we have pretty much good content on YouTube that teach us how to use this tool.
2. SentryOne Plan Explorer: Plan explorer is an amazing tool to analyze your execution plan and tune your queries very quickly. Its completely free.
Click through for the full list of 10.