TL:DR; Java Mail library.
Java Mail library. This is a small java package that can send and receive emails. Including MIME and attachements.
Software development kit for working with native code from any Java application without using Java Native Interface (JNI) technology. You can call functions from any dynamic library or use system API without necessity to waste time on studying JNI.
License4J is a Java library for java software licensing. It is designed to be easy to use and integrate in your Java application. License4J creates license files and secure serial numbers. Includes a free to use,distribute floating license server.
The Java Excel Connector (JEC) allows Java developers to access the Excel application, read, create or modify Excel workbooks and charts.
