WebTTS is a WWW-based trouble ticketing system designed for businesses that need to track problems in their network, schedule system maintence, and track general customer problems. Most large businesses use a tracking system to help deal with customer problems, but these systems are either non-free, custom written, or simply impossible to install and get working in a reasonable amount of time.
Linux/IR is a project with the goal of implementing the IrDA protocol stack into the Linux kernel. IrDA is a standard for infrared communication between devices such as laptops, printers, PDAs, mobile phones, and LAN access points. LAN and printer support has been implemented, and the current release is quite stable. There are still a few problems. The IrDA layers that have been implemented are IrPHY, physical layer, stuffing and wrapping of frames, IrLAP, link layer, sliding windows and link access control, IrLMP, link management, multiplexing, IrIAS, information base, device discovery information, IrLPT, printer support, IrTTP, transport layer, flow control, IrLAN, LAN access, IrOBEX, and object exchange, so you can talk to your Palm III.
Dip handles the connections needed for dialup IP links, like SLIP or PPP. It can handle both incoming and outgoing connections, using password security for incoming connections. It has a command mode (an interactive program to set up an outgoing IP connection), dialout mode (interprets chat script to dial out and open an IP connection), and dialin mode (login shell for handling incoming IP connections, as in dialup SLIP and PPP connections).
The Mail Users' Shell (mush) is a powerful mail program. It does have a curses (and suntools) interface but is best when used with the commandline interface. Considering that it is commandline-based, it is suprisingly simple to use and also has the advantage of being very fast and powerful. For example, you can write scripts to manipulate mail using csh-style syntax.
NetPlug is an extensible multi-connections, multi-protocol, network client program, written in pure Tcl/Tk. Includes a complete Irc client plug in that you should love if you like IrcII 'classic' look & feel (plus customizable style/colors scheme, sound,... Now includes full DCC support (with GUI), ircII like aliases and improved scripting (Tcl!), keywords (your nick...) highlighting, and more