Resilience4j is a fault tolerance library designed for Java8 and functional programming
Hystrix is a latency and fault tolerance library designed to isolate points of access to remote systems, services and 3rd party libraries, stop cascading failure and enable resilience in complex distributed systems where failure is inevitable.
Source of the Minecraft Hacked client Resilience
"Resiliency Studio" is a self-service Resilience Validation Platform, which helps to identify failure points within a system, aids to engineer applications to be fault-tolerant with self-healing capabilities
Frontcache - page fragment cache designed to boost web app performance. It reduces server response time for dynamic pages, reduces load on backend systems multiple times, increases application's resilience. Works as Servlet Filter or Standalone Cache Server.
Enterprise Sales and Procurement Model (ESPM) Cloud Native is a project that showcases how an application can be made resilient by implementing resilience design patterns. This application is developed using Spring Boot framework and can be deployed locally as well as on SAP BTP, Cloud Foundry environment.