streamsupport is a backport of the Java 8 java.util.function (functional interfaces) and java.util.stream (streams) API for Java 6 / 7 and Android developers

A JNA-based (native) operating system information library for Java that aims to provide a cross-platform implementation to retrieve system information, such as version, memory, CPU, disk, battery, etc.

streamsupport-cfuture is a backport of the Java 8 CompletableFuture API with the current Java 9 (JEP 266) enhancements for Java 6 to 8 and Android developers

streamsupport-atomic is a backport of the java.util.concurrent.atomic classes added in Java 8 (Double/Long Accumulator/Adder) for Java 6 / 7 and Android developers

Java 8+ hamcrest matchers and utility functions that use them.