qcon turns any terminal emulator for X into a Quake-style console. It is similar to tilda, kuake, and similar programs, but is't a terminal emulator by itself. Instead, qcon uses your favorite one, controlling its window position and state. It should work with most popular window managers and desktop enviroments.
PerlDAV is a Perl library for modifying content on Web servers using the WebDAV protocol. Now you can LOCK, DELETE, and PUT files, and much more, on a DAV-enabled Web server. The PerlDAV library consists of: HTTP::DAV, an object-oriented Web- DAV client API, dave, the DAV Explorer, an end- user UNIX console program for interacting with WebDAV servers (dave looks and feels like a standard UNIX ftp program).
dterm is a simple terminal emulator which doesn't actually emulate any particular terminal. Mainly, it is designed for use with xterm and friends, which already do a perfectly good emulation. Therefore, it doesn't need any special help; dterm simply provides a means by which keystrokes are forwarded to the serial line, and data forwarded from the serial line appears on the terminal.
psyced is a distributed chat and messaging system based on the Protocol for SYnchronous Conferencing. PSYC is multicast and routed between servers and clients in a scalable and efficient way, but users can also comfortably use IRC clients, telnet, Web chat, WAP, or Jabber to enter the network. psyced also communicates with the network of Jabber/XMPP servers and hosts programmable chat rooms for all of these technologies at once. It also provides gateways to several IRC networks, but unlike IRC, everyone can run a server and be an equal member of the PSYC network. It supports PSYC, XMPP, IRC, TELNET, HTTP, Applet, SMTP, WAP, XML, RSS, and TLS.