Comment by nudpiedo

They have many (you might argue some are somewhat autist but there are): https://developer.ibm.com/code/open/projects/

And they also do several contributions, e.g. openstack, linux kernel

I would agree that IBM is not pop enough and that their motivation is usually not based on ideals or a social contract.

EDIT: I forgot IBM Blockchain, which you might think it is not "core" just because the company is still divided between areas like services, consulting and hardware...

https://github.com/IBM-Blockchain