Libtermui is a terminal driver library. It is fully standalone and lightweight. It does not rely on termcap or curses libraries. It can drive terminals on a TTY or through a telnet connection directly on a TCP socket. It is fully re-entrant, and can be used to drive multiple terminals from different threads. It includes a getline feature (similar to the one in readline) and some console user interface facilities.
Mrxvt (previously known as materm) is a multi-tab X terminal emulator based on rxvt/aterm. It supports multiple tabs, runtime dynamic tab title, pseudo-transparent backgrounds, user-supplied background images (JPEG, PNG, or XPM), background color tinting, text shadows, NeXT/rxvt/xterm/SGI style scrollbars, XIM, multiple languages (Chinese, Korean, and Japanese) and logging. It is lightweight and fast, and only depends on Xlib.
5x9 and 5x10 are two X11 fonts intended for use with xterm or other programs requiring readable small fonts. At only 5 pixels wide, they are particularly well suited to small laptop screens, allowing two 80 column windows side by side on an 800x600 screen (albeit with no room for window frames), or three windows across with room to spare on a 1280x1024 screen. The fonts implement VT100 line-drawing characters. Bolding is not directly supported; xterm does adequate bolding by duplicating pixels.
The sniffy project can trace/log the data of any pseudo terminal in the system. Due to the way the terminal works, such a terminal trace provides complete information of what happened on the terminal screen, and sniffy is able to display/replay this information. It consists of a kernel module able to connect/hook on the pseudo terminal, a program to display the contents of any pseudo terminal on the fly, a daemon process tracing the pseudo terminal content into the file, and a replay program to replay any stored pseudo terminal session.
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).
iTerm is a terminal emulation program written using Cocoa. The letter i represents a native Apple look and feel of the program interface, and an emphasis on complete international support. It provides multiple tabs within one window, support for Applescript, transparent windows and custom background pictures, Rendezvous support, and support for all language encodings that are available with OS X.