Sigil is a multi-platform WYSIWYG ebook editor. It is designed to edit books in ePub format.
Now what does it have to offer...
* Free and open source software under GPLv3
* Multi-platform: runs on Windows, Linux and Mac
* Full Unicode support: everything you see in Sigil is in UTF-16
* Full EPUB spec support
* WYSIWYG editing
* Multiple Views: Book View, Code View and Split View
* Metadata editor with full support for all possible metadata entries (more than 200) with full descriptions for each
* Table Of Contents editor
* Multi-level TOC support
* Book View fully supports the display of any XHTML document possible under the OPS spec
* SVG support
* Basic XPGT support
* Advanced automatic conversion of all imported documents to Unicode
* Currently imports TXT, HTML and EPUB files; more will be added with time
* Currently exports EPUB and SGF (Sigil native format); more will be added with time
* Embedded HTML Tidy; all imported documents are thoroughly cleaned; changing views cleans the document so no matter how much you screw up your code, it will fix it (usually )
* An actually usable user interface
* Native C++ application
* Bugs :)
* And a lot more...
XRay is a free XML editing enviroment. Now in its second major release, XRay provides support for XML Schema (XSD) and an integrated online XML tutorial system.
Writing efficient user interfaces is the main maxim, here at Vimperator labs. We often follow the Vim way of doing things, but extend its principles when necessary.
Towards this end, we've created the liberator library for Mozilla based applications, to encapsulate as many of these generic principles as possible, and liberate developers from the tedium of reinventing the wheel.
webDevStudio is an online integrated development environment (IDE) based on PHP technology. Any software developer would be able to design computer science projects with or without of greater or smaller complexity, using only a Web navigator and without worrying about file and project management (creation, modification, compilation, etc.). Tool would be completely in charge of the projects and registered users. From server machine, it would be provided to developers a set of operations integrated in a powerful graphic interface without having installed in client machine any development component (compiler, code editor, etc).
webDevStudio integrates a simple resource manager whose basic undertaken will consist of maintaining always consistency between server and client machine. User management controls users which are registered and who would have access granted to the tool. Project management controls projects created by users and allows to build them and make backup copies. File management controls files which owns to each project, and they can be downloaded, modified and compiled at any moment.
Liquid XML Studio is a FREE XML Schema Editor, and much more.
Simple enough for new users to pick up quickly and comprehensive enough for experienced users deal with the advanced features of the XSD standard.
KG: Free, but not open source. For the quick schema edit...
CodePress is web-based source code editor with syntax highlighting written in JavaScript that colors text in real time while it's being typed in the browser
"Canorus is a free music score editor. It supports note writing, scripting support, import/export of various file formats, MIDI input and output and more! Note that Canorus is still in early stage of development and not nearly all the features are implemented yet!"