This is a great list. I believe Obsidian (closed source) https://en.wikipedia.org/wiki/Obsidian_(software) is also electron based (it says so on the wikipedia page) and it is quite popular (I could be wrong but it seems to be the second most favorited note app after Notion). For example, the obsidian subreddit has 107 000 members https://www.reddit.com/r/ObsidianMD/ . However, It is rather new as the wikipedia page shows that it was made in 2020.
sindresorhus / awesome-electron
Useful resources for creating apps with Electron
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