Apache Beam is a unified model for defining both batch and streaming data-parallel processing pipelines, as well as a set of language-specific SDKs for constructing pipelines and Runners for executing them on distributed processing backends, including Apache Flink, Apache Spark, Google Cloud Dataflow and Hazelcast Jet.
Struts 最初是 Jakarta项目中的一个子项目，并在2004年3月成为ASF的顶级项目。它通过采用 Java Servlet/JSP 技术，实现了基于Java EE Web应用的MVC设计模式的应用框架，是MVC经典设计模式中的一个经典产品
Apache Ignite is a horizontally scalable, fault-tolerant distributed in-memory computing platform for building real-time applications that can process terabytes of data with in-memory speed.
Simple encoder and decoders for various formats such as Base64 and Hexadecimal.
a set of utilities and Java support classes for running Java applications as server processes.
Provide an API for sending email. It is built on top of the JavaMail API, which it aims to simplify.
a library of lightweight, self-contained mathematics and statistics components addressing the most common practical problems not immediately available in the Java programming language or commons-lang.
