This isn't my project, but it was announced on Reddit and Hacker News today to some lively discussion, and I was interested in what this community thought, especially if anyone has tried it yet.
It's not free, but note:
What language is TabNine written in?
TabNine is 11,000 lines of Rust.
In recognition of the fact that TabNine could not exist without the Rust ecosystem, TabNine's paid features are always enabled when completing Rust code.
. Kudos to the author for doing that!