Outliner Lighto is a console-based outliner/hierarchical editor. An outliner is used to edit an hierarchy of text (a tree with text in every node). This hierarchy can represent anything the user wants, like TODO lists, calendar, tasks, address book, bookmarks, etc. It is based on FreePascal's video and keyboard units.
gEcrit is a source code editor oriented toward Python. It tries to keep the interface as clean as possible and keep the menus simple. It features all the common features a Python programmer might need, including an interactive Python interpreter and operating system shell. It supports a plugin system for expandability.
mtCellEdit is a lightweight spreadsheet program. Its main goal is to provide facilities for simple day-to-day tasks using a minimal graphical user interface. It uses TSV based file formats to ensure that archived data is always accessible to other programs, regardless of operating system, both now and in the future. These "other programs" might be spreadsheet programs, text editors, command line tools, or custom built programs. It is written from scratch and provides all of its core facilities via a library, so any C program can access its API.
ck-jsf-editor is an editor component for JSF 2 that uses the popular browser editor, CKEditor. Most JSF editors lack the functionality of CKEditor and require using an entire component library. ck-jsf-editor is a standalone rich text editor component that requires no real configuration or setup. The ck-jsf-editor.jar file can just be dropped into your project and used in your JSF pages.
Qute is a text editor with Markdown and TeX support. It offers per-paragraph previews so users can switch between editing the source and viewing a rich text rendering with typeset formulas for each paragraph separately. To make looking at a single text file for hours appealing, Qute offers switchable themes with subtle background images and font effects and includes a couple of great Open Source fonts which are a joy to work with. Qute's user interface is distraction-free and offers a full-screen mode. In this sense, it is similar to such great editors as WriteRoom, Dark Room, and WriteMonkey. As far as the themes are concerned, however, Qute is far more adventurous. Qute reads and writes plain text files using the Markdown markup language for rich text formatting and TeX syntax for formulas. Paragraphs are separated by blank lines. While it is possible to edit arbitrary text files with Qute, editing (for example) source code is not what Qute is intended for. Instead, Qute is a tool for writing prose. Qute is built using Web technologies. In particular, it uses Chromeless, Showdown, and MathJax.