YaCS - A window based chatserver with the ability to log or kick users. You can connect to the server by using PuTTY or Microsoft Telnet, because the chat supports VT100 and the telnet protocol.
NetworkTools has 2 components: A protocol analyzer which plays a TCP client or server or pipeline, which sits between a client and server and shows how they communicate. A port scanner can scan a range of IP addresses and ports. See screenshots.
The Kava Telnet Application is complete telnet and SSH application featuring pluggable modules for easy customization. This is an up-to-date "fixed-and-patched" fork of the fantastic JTA project by Matthias Jugel and Marcus Meissner.
MultiExecutor is a tool for managing distributed unix like systems and databases that has jdbc drivers. Only entering from one console you can execute same script or command on multiple machines and you can see the results seperately.
PCMan is an easy-to-use telnet client mainly targets BBS users formerly running under MS Windows. PCMan X is a newly developed, open-source and cross-platform version written with wxWidgets, supporting X Window, MS Windows, and Mac OS X.
JINX is a Java-based multi-user Unix-like environment that allows each user to remotely run their own java programs. Also the home of CurseHTTPD, a non-blocking java HTTP server.
Atani Software has a primary focus of developing games for various platforms and also try to keep the good old BBS' alive with releases of door games, etc.
JBuzz BBS Server is a telnet daemon which provides several communication facilities, like discussion board and chatting room for clients to experience. In order to extend functions for the system more easily, the feature called "applet" is introduced.
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This small project fills a need for network administrators to centralize their SSH keys management. It allows to manage a database of public keys via a GUI (and an upcoming command line interface), dinamically enabiling on a per-key, per-user and per-host
BBMan is a SSH/SFTP/BBS/telnet Client. Free, opensource and multi-platform support (Windows/Linux/Mac). You can get some screenshots in http://bbman.sf.net/
A GTK+ MUD client with support for MCCP, MXP, support for the zChat and MudMaster peer-to-peer chat protocols, the MUD sound protocol (MSP), Telnet GA support, regexp trigger support, aliases, Perl and Python plugin support.
gtermix is a gtk+ telnet client intended for calling BBSes. It utilizes a custom VGA textmode emulating terminal widget that allows it to accurately render bulletin board systems as they were in DOS terminal programs.
JTelnet is a simple telnet library for Java with a few demo applications. One is a simple command line telnet, another is a Swing component that includes VT100 emulation.
The Java(tm) Telnet Applet is a fully featured telnet/SSH program that allows users to connect and login to remote hosts via the Internet or an
Intranet using only their WWW Browser. It includes not only telnet-compliant connection services, but also th
FreeHost3270 is a complete 3270-to-web solution, providing single-point deployment of legacy 3270 applications to unlimited clients. It delivers either a java applet-based TN3270 emulator, or a stand alone application with rich GUI.
The goal of Slipper is to control peer to peer applications on a remote server. This might be of some use to people behind firewalls and proxies and are being banned on some ports (ie napter, gnutella), but ftp and telnet ports are still available.
A MUD client completely written in java. It is especially designed for use with the Discworld MUD (discworld.atuin.net) but can be used with any other text based MUD. The program can parse ANSI colour control characters to enable coloured output.
SmartShell is a Java web application providing a pure HTTP/HTML client for secure shell access (SSH). The user interface is simple and AJAX based and can be simply customized to fulfill your needs.