List of free feedback stuff for developerππ½
If you're looking for all programming tools around feedback (not just free). Check this page List of feedback Programming Tools

Livecycle
Get PRs reviewed instantly and ship code 10x faster by collaborating on top of ephemeral environments.
Tag: productivity, collaboration, remote, reviews, feedback, Github, pull-request
Free tier: Up to 5 active team members Free forever: For open source projects, unlimited members