JTransforms is the first, open source, multithreaded FFT library written in pure Java.

Guava is a suite of core and expanded libraries that include

Alternate implementations of JDK's "Math" functions.

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

feature-rich collections framework for Java, offering alternatives to standard Java Collections.

The API module of Eclipse Collections, offering rich and efficient data structures for Java.

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

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