The best alternatives to Swoosh are Zesture, WatchNote, and Voice Board. If these 3 options don't work for you, we've listed a few more alternatives below.
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Notion— Get over $6,000 worth of Notion + unlimited AI, for free
Zesture uses your laptop's camera (and AI) to give you touch-free control over your media, entertainment and presentation applications (without any extra hardware). It works with apps like Powerpoint, Netflix, YouTube, Spotify, Apple & Amazon Music and more.
Svadilfari is a Safari extension that lets you control Safari with Gestures. By drawing gestures on websites, you can perform various actions in Safari, such as opening/closing tabs, copying URLs, and executing JavaScript.