The most famous is arguably Snorkel, which started with an open-source library as a research project. We used that a lot ourselves, but the library by now is deprecated.

We aim to extend on that idea by providing something that comes as close to a programmable interface for data-centric tasks as possible, and do so via open-source.

There are lots of cool tools out there btw. in that area. Definitely worth to have a look at a landscape (haha idea for the next HN post incoming I guess :D)