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.
xtermcontrol enables dynamic control of XFree86 xterm properties. It makes it easy to change colors, titles, fonts, and the geometry of a running xterm, as well as to report the current settings of the properties. Window manipulations such as (de)iconify, raise and lower, maximize and restore, and reset are also supported. It also lets advanced users issue any xterm control sequence.
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.
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.
X Northern Captain is a file manager for X Windows. XNC has the same ideology as Norton Commander but also many additional and specific functions including a Virtual File System with support for tar, zip, rar, rpm, deb, bzip2, and lha archives, FTP support, built-in xterminal, viewer for JPEG, GIF, BMP, TGA, XPM, and XBM formats, an editor, users menu, extensions association, bookmarks for frequently used directories, and more.
Bashrun provides a powerful application launcher by running a specialized bash session in a small terminal window, conveniently providing bash features like tab completion and history. Additional features include user-configurable rules for automatically launching certain commands in a new terminal window, looking up manual and info pages, performing dict and Google queries, defining bookmarks for Web pages, or piping command output to the clipboard. Users can add more functionality by defining arbitrary rules for rewriting command lines based on regular expression matches and file test operators. This makes new features like file associations or Web shortcuts trivial to implement.
Terminal is a modern terminal emulator for the Unix/Linux desktop, primarly for the Xfce desktop environment. It was developed because Xfce needed a lightweight and easy-to-use terminal emulator that didn't require the user to install the GNOME libraries, but still provided a worthy alternative to the GNOME terminal emulator, with all the bells and whistles.
Libptytty is a small library that offers pseudo-TTY management in an OS-independent way. It was created out of frustration over the many differences of PTY/TTY handling in different operating systems for use inside "rxvt-unicode". It also offers session database support (utmp and optional wtmp/lastlog updates for login shells) and supports forking a proxy process after startup and dropping privileges in the calling process. It offers C++ and C-only APIs.
ggiterm is a software terminal emulator like xterm. However instead of X, it uses the GGI system for its rendering, which allows it to be displayed on anything from a framebuffer to multi-screens across networked hosts (including ordinary X sessions). It features multiple font formats, anti-aliasing, vt100 compatibility, and full internationalization.