Guava is a suite of core and expanded libraries that include

Simple Magic number package which allows content-type (mime-type) determination from files

Fast, lightweight, RFC 4180 compliant CSV library for Java with zero dependencies.

Fundamental components and support for building new components

The Commons Text library provides additions to the standard JDK text handling. It includes algorithms for string ...

Apache Commons Compress defines an API for working with

Java MIME Document Object Model

XZ data compression

Eclipse Yasson. Reference implementation of JSR-367 (JSON-B).