GiraffeFTP is a Java based FTP client and server. It includes GUI and command line tools. Good code to see to understand the FTP Protocol and sockets. Also includes a non-standard implementation of SSL sockets.
Feature rich FTP Library using Java 1.4 / 5.0 (2 different builds) methods and java.nio.
Code is now located at GitHub (https://github.com/arnold-maderthaner/ftp4che).
For issues and patches please open this on GitHub too.
A mailing service code written in JAVA where users can mail content without logging in their respective email ids. Very useful for organizations with high security.
Java Virtual System (JVS) is built around a virtual file system (VFS) - a common platform of Java, by Java, for Java. JVS extends JVM and makes it from an interpreter running half-compiled code a first-class server.