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

Krisp - Noise Cancellation and Echo Removal
Use Krisp to remove distracting background noise and echo during online meetings and podcasts, and maintain your mic's HD audio quality.
Tag: audio, noise-cancellation
Limited Noise Cancellation