GNU TeXmacs is a free wysiwyw (what you see is what you want) editing platform with special features for scientists. The software aims to provide a unified and user friendly framework for editing structured documents with different types of content: text, mathematics, graphics, interactive content. TeXmacs can also be used as an interface to many external systems for computer algebra, numerical analysis, and statistics. New presentation styles can be written by the user and new features can be added to the editor using Scheme.
Screen is a full-screen window manager that multiplexes a physical terminal between several processes, typically interactive shells. Each virtual terminal provides the functions of the DEC VT100 terminal and, in addition, several control functions from the ANSI X3.64 (ISO 6429) and ISO 2022 standards (e.g., insert/delete line and support for multiple character sets).
The xterm program is the standard terminal emulator for the X Window System. It provides DEC VT102/VT220 and Tektronix 4014 compatible terminals for programs that can't use the window system directly. If the underlying operating system supports terminal resizing capabilities (for example, the SIGWINCH signal in systems derived from 4.3bsd), xterm will use the facilities to notify programs running in the window whenever it is resized.
rxvt-unicode is a clone of the well known terminal emulator rxvt, modified to store text in Unicode and to use locale-correct input and output. It also supports mixing multiple fonts at the same time, including Xft fonts, real transparency, and an optional embedded Perl interpreter that allows you to extend your terminal easily.
x11vnc allows one to remotely view and interact with real X displays (i.e. a display corresponding to a physical monitor, keyboard, and mouse) with any VNC viewer. It is designed to be compatible with all Unix variants and Mac OS X, and depends on a small set of standard libraries. It supports SSL/TLS and VeNCrypt encryption, Unix password logins, single port access, Zeroconf, file transfer, and UltraVNC extensions. It is part of the LibVNCServer project.
rlwrap is a readline wrapper, a small utility that uses the GNU readline library to allow the editing of keyboard input for any other command. It maintains a separate input history for each command, and can TAB-expand words using all previously seen words and/or a user-specified file.
Mintty is a terminal emulator for Cygwin and MSYS with a native Windows user interface and minimalist design. It is based on parts of PuTTY by Simon Tatham and provides xterm-compatible terminal emulation, but does not require an X server. Its features include a simple options dialog, Unicode support, fullscreen mode, drag & drop, and window transparency.
Userful MultiSeat is a multiseat Linux desktop virtualization solution that enables a single computer to support up to 11 independent users at the same time, each with their own monitor, keyboard, and mouse by using USB multiseat devices, and virtualizing the X server. This approach offers the features of a full PC including high performance video and significantly reduces hardware costs, support and maintenance costs, electricity consumption, and e-waste as compared to stand alone PCs or thin clients. It installs on popular Linux distributions including Ubuntu and Edubuntu (operating system for schools). It supports 3D graphics, per-seat USB, 2-way audio, and all major USB multiseat devices, including the HP t100, t150 & t200, Acer Zero-Client Docking Station, Viewsonic VMA10, Atrust M200 & M202, GWC DU2600, and Displaylink devices, as well as video cards from Intel, ATI, and NVIDIA. Userful MultiSeat is available as both a standalone package for multi-seat enabling your Linux distribution of choice, and as a bundled install DVD for schools, which Includes Userful MultiSeat, Edubuntu operating system for education, and the ITALC classroom management tool. It was formerly called Userful Multiplier.