A simple Echo server (RFC 862) written in Java. It works via HTTP/1.0. It has several modes of operation. For further information run it with the --help option. Use telnet or a web browser to access the server.
RealMint is an ANSI terminal emulator and telnet client written completely in JavaScript. When installed, RealMint lets you login to your server from a web browser using telnet and an encrypted HTTPS tunnel.
SWAL is a program that can launch as a service (or standalone) and monitor other services and control other programs. Written in C++ and might have some .NET components (planning on a linux port)