There were plenty of those, including commercial ones.
It's pretty hard to find but ~25 years ago I was using Xi Graphics Accelerated-X which had 3D acceleration long before Xfree86.
Update: but yes I imagine it had some code from original MIT release.
For completely independent one you can have a look at WeirdX/WiredX, which was written in Java and even supported antialiasing and transparency for core protocol (something that Xfree86 people claimed to be impossible to implement).
Software solutions like Moonlight/Sunshine have been able to do that with near-zero latency for a long time and they are not even the first. Phones have chips capable of capturing 4K 120fps. Why is it so hard for KVM devices?
Can it help with the annoying macos bug that about half the time disconnecting and reconnecting external screen to my MacBook does not move windows back to external screen?
The C++ plugin is included in Android Studio which is essentially a distribution of IntelliJ. There seems to be no technical reason for not allowing it in full IntelliJ.
There are tools like voidtools Everything2 and WizTree that directly read NTFS from disk device bypassing windows FS apis and are blazingly fast (faster than find/du on ext4 in Linux).
With some work on better tooling it could've been used to detect and thwart supply chain attacks, which are a growing concern. Process level sandboxing is too coarse.
So why is it still pretty slow for file operations on DevDrive (no filters, async antivirus)? I found the performance improvement not that significant.
Does takeout include any metadata not accessible via IMAP? Does it even include labels?