https://github.com/IRS-Public/direct-file <- Direct File's web app source code is public-domain and published on GitHub!

Obviously the 2025 version will be out of date for the 2026 filing season, though public code means it can always be revived by anyone else.

(previous HN threads: https://news.ycombinator.com/item?id=44182356 https://news.ycombinator.com/item?id=44131901 )