TurtleShell has built multiple open-source tools, frameworks and libraries. Lets go by them one-by-one:

Circuit Breaker SDK: as part of having authored EIP-7265 (Circuit Breaker Standard), we are actively building and advancing towards the further adoption of this standard as a proven measure to improve protocol security on EVM. Besides helping to improve the problem of a lacking smart contract defense mechanisims against hacks, we also lower with this SDK specifically the barrier of adopting them. Smart Contract Developers can import circuit breakers with this SDK to their projects to easily integrate them to their logic.

Security Monitoring Tools: as a complementary feature to the SDK, we have built an open-source dashboard, that you can easily spin up as a react project and plug it to your deployed and verified contracts that have incorporated Circuit Breakers. This especially solves on the one side the problem of lacking open-source and free security monitoring solutions (there is plenty paid once, but almost 0 free ones), AND giving non-technical people the ability to see and understand what is happening and have a sense of what the current protocols health looks like.