GNU Aspell is a spell checker designed to eventually replace Ispell. It can either be used as a library or as an independent spell checker. Its main feature is that it does a superior job of suggesting possible replacements for a misspelled word than just about any other spell checker out there for the English language. Unlike Ispell, Aspell can also easily check documents in UTF-8 without having to use a special dictionary. Aspell will also do its best to respect the current locale setting. Other advantages over Ispell include support for using multiple dictionaries at once and intelligently handling personal dictionaries when more than one Aspell process is open at once.
jEdit is an Open Source text editor written in Java. It has many useful features, such as syntax highlighting, bracket matching, regular expression searching, multiple file search and replace, folding, and keyboard macros. jEdit also includes a powerful plugin architecture that allows more than 80 plugins to be downloaded and installed from within the editor.
KOffice is an integrated office suite based on the KDE libraries. KOffice currently includes KWord, KSpread, KPresenter, KChart, Karbon14, Krita, Kexi, KFormula, Kugar, and Kivio. There are no special mail and news clients included in KOffice, because there are KMail and KNode available for KDE anyway. All KOffice components work together, and you can embed every KOffice component into any other KOffice component. This is realized using the KParts object model.
Elvis is a clone of vi/ex, the standard UNIX editor. Elvis supports nearly all of the vi/ex commands, in both visual mode and ex mode. Elvis adds support for multiple files, multiple windows, a variety of display modes including "hex" and "html", on-line help, WYSIWYG printing, and other miscellaneous extensions.
Cooledit is a text editor for the X Window System. It contains a built-in Python interpreter for macro programming, and it includes a rich set of utilities and features. It has multiple edit windows and a beautiful, intuitive user interface that requires no tutoring to learn to use. It can be used as a programmer's IDE and has syntax highlighting for a large number of programming languages. It contains an interactive graphical debugger for C/C++ programs.
vile is a text editor which is extremely compatible with vi. It has extended capabilities in many areas, including multi-file editing and viewing, mouse support, infinite undo, additional operators, and rectangular operations. Vile has an optional Perl interface for UNIX and NT. It can also be built as "xvile", which is fully X-aware, or "winvile" for Win32, with scrollbars, menus, etc.
Siag Office is a free office package which consists of the spreadsheet Siag, the word processor PW, the animation program Egon, the text editor XedPlus, the file manager Xfiler and the previewer Gvu. Siag is easy to use, yet infinitely flexible through multiple embedded interpreters and a plugin mechanism that allows other programs to run inside the main document. The supported interpreters are SIOD, Guile, Tcl, and Python.
NetBeans is a cross-platform IDE written in Java. It supports development in Java, and support for other languages can be added. The whole IDE is built around a core framework with APIs, and features are implemented in the form of plugin modules. This clean, modular architecture makes NetBeans a good platform for building development tools and custom IDEs.
Xwpe is a programming environment with a user interface that mimics the Borland C and Pascal family of products. From within xwpe you can edit, compile, and debug programs. The xwpe-alpha project was an attempt to continue development and bug fixes for xwpe. Additional releases may occasionally occur, but major development has ceased.