RichEdit is described as 'Lightweight, handy and useful text editor which allows you to create, open, and save files using both the Rich Text Format and the Plain Text Format. Vikon has all the features of an advanced text editor' and is an app in the Development category. There are more than 50 alternatives to RichEdit for a variety of platforms, including Windows, Linux, Mac, BSD and Chrome OS. The best alternative is Notepad++, which is both free and Open Source. Other great apps like RichEdit are Atom (Free, Open Source), Sublime Text (Free Personal), Geany (Free, Open Source) and gedit (Free, Open Source).
Aptana Studio is a complete web development environment that combines powerful authoring tools with a collection of online hosting and collaboration services that help you and your team do more. Includes support for PHP, CSS, FTP, and more...
Notepadqq is designed from developers, for developers. With its more than 100 supported languages, it is the ideal text editor for your daily tasks. How to install? Search a package for your Linux distribution or, if you're on Ubuntu, add the ppa.
PSPad is a freeware programmers editor in 8 languages for Microsoft Windows operating systems. Some features are highlighted syntax, ftp, projects and so on. Code explorer for Pascal, C/C++, INI, HTML, XML, PHP and more in development, internal web browser with APACHE support.
ReText is a simple text editor for Markdown and reStructuredText documents with syntax highlighting and optional live preview. It is written in Python using Qt libraries, able to run on any platforms (Linux and BSD are officially supported).