Guava is a suite of core and expanded libraries that include

Caching functionality

Apache HTTP Client configured with sensible defaults.

Apache Commons Lang, a package of Java utility classes for the classes that are in java.lang's hierarchy, or are ...

Apache HttpComponents Client

Apache HttpComponents HTTP/1.1 core components

The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains the JCA/JCE ...

The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains ...

API for SLF4J (The Simple Logging Facade for Java) which serves as a simple facade or abstraction for various logging ...

Jakarta/Apache commons logging 1.2 implemented over SLF4J

Hamcrest matchers for JDK8's Optionals and Streams, and the java.time package

A property check framework for Vavr.

Vavr (formerly called Javaslang) is an object-functional language extension to Java 8+.

JUnit Jupiter is the API for writing tests using JUnit 5.

Core API and libraries of hamcrest matcher framework.

Mockito mock objects library core API and implementation

Binding/provider for SLF4J, which outputs all events to System.err. Only messages of level INFO and higher are printed.