FTE is a text editor for X-Windows and console with I18N support. It features color syntax highlighting for C/C++, HTML, PERL, TEX, and many more, multiple file/window editing, column blocks, configurable menus and keyboard bindings, mouse support, undo/redo, regular expression search and replace, folding, as well as background compiler execution.
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.
Gnutran is a simple, Emacs-based front-end to a number of machine translation engines available on the Web. It can send emacs buffers to a translation engine, request a translation (e.g. English to Portuguese) and display the result on a new window. GNUTRAN interoperates with emacs-based email agents such as VM-Mail and features a highly configurable interface, allowing easy set up of new translation pairs through Emacs' customization interface.
GOOPS is the object-oriented extension to Guile. Its implementation is derived from STk and Tiny-Clos. It is very close in spirit to CLOS (the Common Lisp Object System) but is adapted for the Scheme language. While GOOPS is not compatible with any of these systems, GOOPS contains a compatibility module which allows for execution of STKlos programs. Briefly stated, the GOOPS extension gives the user a full object oriented system with multiple inheritance and generic functions with multi-method dispatch. Furthermore, the implementation relies on a true meta object protocol, in the spirit of the one defined for CLOS.
GTK Development Environment (GDE) acts as a framework when you are programming. It is not an integrated development environment, but more a tool to manage programming projects. It keeps the user from switching between terminals and editor windows, with a project explorer. Making and running a project can be done with function keys, with commands the user defines.
GtkEditor is a source code editor widget for GTK+. It is currently used, in one version or another, in several GTK+/GNOME applications, including gIDE, VDKBuilder, and GXEdit. The gtkeditor widget sub-classes the gtktext widget, and after initialization, the editor widget can be treated as the usual text widget, and all source-code editing features are taken care of by the widget itself. The behaviour of the editor is decided by dynamic libraries loaded during initialization of the widget. These libraries can be hand-coded or (in the future) created using tools supplied with GtkEditor.
ics.el is a comint based Emacs major mode for handling the text portion of communications with internet chess servers such as FICS and ICC. It is written in Emacs-Lisp and works best in conjunction with a graphical interface such as Xboard. It handles colour highlighting and "buttonisation" (making certain portions of text active so that, for example, you can challenge opponents with a single mouse click) as well as command recall and editing and automation of commands based on regexps seen in the ICS output, all highly customisable using Emacs lisp.