The MITRE ATT&CK® knowlege base.
This “open to everyone” resource helps you design and build safer IT solutions.
“To know your Enemy, you must become your Enemy” - Sun Tzu
CISO Assistant Community
Here is the community edition of the CISO Assistant product from the company intuitem.
In a drive to make GRC (Governance, Risk, and Compliance) more accessible for everyone, the company decided to open source their product, see the original blog post here https://intuitem.com/blog/we-are-going-open-source/.
Many thanks to the communities, organisations and people involved in these projects ❤️.