I wouldn't call it overlooked and it's probably not the typical open source project, but I'm quite proud of this, so here is it: https://acoustid.org/ https://

I wouldn't call it overlooked and it's probably not the typical open source project, but I'm quite proud of this, so here is it: https://acoustid.org/ https://acoustid.org/ https://bitbucket.org/acoustid https://bitbucket.org/acoustid There has been a few attempts at open source audio fingerprinting service before and after AcoustID, but none of them survived for long. It's been 5 years since I started working on this. I'm particularly proud of the project, because I have done it the way I think software should be done and it worked wonderfully. I spend a lot of time researching, then ran some experiments, set myself some goals of what is practical to do and what exact use cases I want to support, designed and implemented it and then I was able to run it without any scaling problems for years.