Light Table is a new interactive IDE that lets you modify running programs and embed anything from websites to games. It provides the real time feedback we need to not only answer questions about our code, but to understand how our programs really work.

Light Table - The next generation code editor

The CDT Project provides a fully functional C and C++ Integrated Development Environment based on the Eclipse platform. Features include: support for project creation and managed build for various toolchains, standard make build, source navigation, various source knowledge tools, such as type hierarchy, call graph, include browser, macro definition browser, code editor with syntax highlighting, folding and hyperlink navigation, source code refactoring and code generation, visual debugging tools, including memory, registers, and disassembly viewers. 

Eclipse CDT - C/C++ Development Tooling

Onivim 2 is a reimagination of the Oni editor. Onivim 2 aims to bring the speed of Sublime, the language integration of VSCode, and the modal editing experience of Vim together, in a single package. Onivim 2 is built in reason using the revery framework.
 
Onivim 2 uses libvim to manage buffers and provide authentic modal editing, and features a fast, native front-end. In addition, Onivim 2 leverages the VSCode Extension Host process in its entirety - meaning, eventually, complete support for VSCode extensions and configuration.

Onivim 2 is a reimagination of the Oni editor. Onivim 2 aims to bring the speed of Sublime, the language integration of VSCode, and the modal editing experience of Vim together, in a single package. Onivim 2 is built in reason using the revery framework.

Onivim 2 - Lightweight, Modal Code Editor

Eric is a full featured Python and Ruby editor and IDE, written in python. It is based on the cross platform Qt gui toolkit, integrating the highly flexible Scintilla editor control. It is designed to be usable as everdays quick and dirty editor as well as being usable as a professional project management tool integrating many advanced features Python offers the professional coder. eric4 includes a plugin system, which allows easy extension of the IDE functionality with plugins downloadable from the net. Current stable versions are eric4 based on Qt4 and Python 2 and eric5 based on Python 3 and Qt4.
 Its features include:
 <ul>
	<li>Unlimited number of editors</li>
	<li>Configurable window layout</li>
	<li>Configurable syntax hilighting</li>
	<li>Sourcecode autocompletion</li>
	<li>Sourcecode calltips</li>
	<li>Sourcecode folding</li>
	<li>Brace matching</li>
	<li>Error highlighting</li>
	<li>Advanced search functionality including project wide search
	 and replace</li>
	<li>Integrated class browser</li>
	<li>Makro recordings</li>
	<li>Integrated version control interface for Cvs and 
	 Subversion repositories (as plugins)</li>
	<li>Integrated sourcecode documentation system</li>
	<li>Integrated python debugger including support to debug
	 multithreaded applications</li>
	<li>Integrated, full featured Ruby debugger</li>
	<li>Integrated profiling and code coverage support</li>
	<li>Integrated task (todo items) management</li>
	<li>Advanced project management facilities</li>
	<li>Interactive Python shell including syntax hilighting and autocompletion</li>
	<li>Interactive Ruby shell including syntax hilighting and autocompletion</li>
	<li>Integrated rope refactoring tool (as optional plugin)</li>
	<li>Application diagrams</li>
	<li>running external applications from within the IDE</li>
	<li>integrated unittest support</li>
	<li>Cyclops cycles finder support</li>
	<li>Integrated CORBA support based on omniORB</li>
	<li>Integrated interface to cx_freeze (as optional plugin)</li>
	<li>Integrated interface to PyLint (as optional plugin)</li>
	<li>Many integrated wizzards for regex and Qt dialogs (as plugins)</li>
	<li>Localizations. Currently Eric is available in English, German,
	French, Russian, Czech, Spanish and Turkish.</li>
</ul>

Eric is a full featured Python and Ruby editor and IDE, written in python. It is based on the cross platform Qt gui toolkit, integrating the highly flexible Scintilla editor control. It is designed to be usable as everdays quick and dirty editor as well as being usable as a professional project management tool integrating many advanced features Python offers the professional coder.

Eric - Python and Ruby editor and IDE

SharpDevelop is an Integrated Development Environment (IDE) for .NET Framework applications. It supports the development of applications written in C#, Visual Basic.NET, Boo and IronPython. It provides all of the features required from a modern Windows IDE, such as code completion, project templates, an integrated debugger and a forms designer. It has good compatibility with Visual Studio Express and Visual Studio 2008 by using the same project and solution file format. Its features include:
 <UL>
	<LI>Creating Windows Applications</LI>
	<LI>Creating Boo Applications</LI>
	<LI>Visually Designing Forms</LI>
	<LI>Code Completion</LI>
	<LI>Code Generation</LI>
	<LI>Refactoring</LI>
	<LI>XML Comments</LI>
	<LI>Code Navigation</LI>
	<LI>Debugging</LI>
	<LI>Converting Code between Languages C# to Boo / VB.NET</LI>
	<LI>Unit Testing</LI>
	<LI>Code Coverage</LI>
 </UL>

SharpDevelop is an Integrated Development Environment (IDE) for .NET Framework applications. It supports the development of applications written in C#, Visual Basic.NET, Boo and IronPython.

sharpdevelop - IDE for C#,VB.NET,Boo,IronPython

Reactide is the first dedicated IDE for React web application development. It is a cross-platform desktop application that offers a custom simulator, making build-tool and server configuration unnecessary. Reactide brings development back to the days where opening a single file instantly renders the project in the browser. With Reactide, developers can achieve the same simplicity with a single React JSX file while still utilizing the power of React.

Reactide - First dedicated IDE for React web application development

Deco is an IDE for React Native. It's an all-in-one solution for writing React Native apps that you can download and use without any environment setup. Deco improves the React Native development workflow by focusing on component reuse and enabling you to edit your UI in real time.
 
Deco is great for prototyping and visual work, thanks to the speed of inserting and tweaking components. Instant "new project" creation makes building individual components and libraries for publishing on npm much more convenient. Deco is also very useful for learning React Native, since you can play with the built-in components without first reading up on their APIs.

Deco is an IDE for React Native. It's an all-in-one solution for writing React Native apps that you can download and use without any environment setup. Deco improves the React Native development workflow by focusing on component reuse and enabling you to edit your UI in real time.

Deco IDE - The React Native IDE

VSCodium is a Free/Libre Open Source Software Binaries of VS Code. This is a repository of scripts to automatically build Microsoft's vscode repository into freely-licensed binaries without MS branding / telemetry / licensing with a community-driven default configuration.

VSCodium - VS Code without MS branding / telemetry / licensing

NINJA-IDE ("Ninja Is Not Just Another IDE"), is a cross-platform integrated development environment specially design to build Python Applications. 

NINJA-IDE provides a complete code editor with highlighting for several languages, Code Completion, Code Folding, Automatic Indentation, Brace matching, Code assistant for imports, navigation, etc. Syntax Highlighting is supported for Python, Java, efene, C, C++, C#, HTML, CSS, and Javascript. 
 
Its display manager provides support to use an embedded Python Console into the IDE, and loads several plug-in widgets. Python files could be grouped under single project and it could be managed with in the IDE. Basically file management and project management made easy. Execute the project with-in the IDE. 

Source code location: <A HREF="http://code.google.com/p/ninja-ide/" target="_blank">http://code.google.com/p/ninja-ide/</A>

NINJA-IDE ("Ninja Is Not Just Another IDE"), is a cross-platform integrated development environment specially design to build Python Applications.

Ninja IDE - A Real Python IDE

Codelobster PHP Edition streamlines and simplifies php development process. It provides HTML editor, HTML code inspector, CSS editor, JavaScript editor, PHP editor, PHP debugger and lot more. 

 Its features include 
 <UL>
	<LI>Code highlighting for PHP, HTML, JavaScript and CSS</LI>
	<LI>Powerful autocompletion for HTML, PHP, CSS and Javascript, including HTML5 and CSS3. For PHP the structure of project is fully recognized, and the complete list of methods falls out in the proper places.</LI>
	<LI>HTML/CSS inspector on the type of Firebug, which allows easily to correlate the selected elements of page with a code and proper style.</LI>
	<LI>Context help on all supported languages. By pressing F1 key the page with detailed description for current tag, attribute or function will be opened.</LI>
	<LI>PHP debugger allows to execute PHP scripts incrementally, watching the values of all variables in every line.</LI>
	<LI>SQL manager allows to produce all necessary actions with a database - to add, delete, edit a structure and records in tables, to export data, execute SQL queries. Highlighting and autocompletion works for SQL files also.</LI>
	<LI>Support of FTP allows to work straight with a remote server and to do all necessary changes with files.</LI>
	<LI>The portable option allows to use editor without the preliminary installation.</LI>
	<LI>Other useful utilities: pair highlighting, possibility of blocks selection, collapsing, tooltips, navigation on descriptions of functions and included files at withholding of the key of CTRL, viewing of structure of files and project, preview in a browser, book-marks, and all other standard possibilities for work with a code.</LI>
	<LI>Plugins available for Drupal, Joomla, CakePHP, CodeIgniter, Symfony, Yii, JQuery, WordPress, Smarty </LI>
 </UL>

 <img src="/AppImages/Article/codelobster-img1.png" alt="" class="float-center"> 

 It is NOT open source. It has Free, Lite and Professional editions available. Free editon has limited set of features but it is worth to take a look.

Codelobster PHP Edition streamlines and simplifies php development process. It provides HTML editor, HTML code inspector,  CSS editor, JavaScript editor, PHP editor, PHP debugger and lot more.

Codelobster - Free Portable IDE for PHP/HTML/CSS/JavaScript Development

StatET is an Eclipse based IDE (integrated development environment) for R. It offers a set of mature tools for R coding and package building. This includes a fully integrated R Console, Object Browser and R Help System, whereas multiple local and remote installations of R are supported.

StatET - Eclipse based IDE and Tools for R

Editra is a multi-platform text editor with an implementation that focuses on creating an easy to use interface and features that aid in code development. Currently it supports syntax highlighting and variety of other useful features for over 60 programming languages.

Editra - A Developer's Text Editor

DrJava is a lightweight programming environment for Java designed to foster test-driven software development. It includes an intelligent program editor, an interactions pane for evaluating program text, a source level debugger, and a unit testing tool.

DrJava - Lightweight development environment for writing Java programs

Code::Blocks is a free C++ IDE built to meet the most demanding needs of its users. It is designed to be very extensible and fully configurable. Finally, an IDE with all the features you need, having a consistent look, feel and operation across platforms. Built around a plugin framework, Code::Blocks can be extended with plugins. Any kind of functionality can be added by installing/coding a plugin. For instance, compiling and debugging functionality is already provided by plugins! Multiple compiler support:
GCC (MingW / GNU GCC), MSVC++, Digital Mars, Borland C++ 5.5, Open Watcom and more. integrates Debugger. Other feature include code completion, code folding, tabbed interface etc.

Code::Blocks is a free C++ IDE built to meet the most demanding needs of its users. It is designed to be very extensible and fully configurable. Built around a plugin framework, Code::Blocks can be extended with plugins. Any kind of functionality can be added by installing/coding a plugin.

Codeblocks -  The open source, cross platform C, C++ and Fortran IDE

IntelliJ IDEA is a code-centric IDE focused on developer productivity. IntelliJ IDEA deeply understands your code and gives you a set of powerful tools without imposing any particular workflow or project structure. IntelliJ IDEA is your dream pair-programmer who knows its way around the codebase, makes great suggestions right when you need them, and is always ready to help you shape your code. Lightweight IDE for plain Java development, with XML and Groovy support, Most intelligent coding assistance, refactoring and code inspection tools, Integration with JUnit and TestNG, popular VCS tools, Ant and Maven, Supports Java, Groovy, XML, Scala, Clojure. Enterprise edition is available and it has lot more feature than Open Source Edition

IntelliJ IDEA is a code-centric IDE focused on developer productivity. IntelliJ IDEA deeply understands your code and gives you a set of powerful tools without imposing any particular workflow or project structure. IntelliJ IDEA is your dream pair-programmer who knows its way around the codebase, makes great suggestions right when you need them, and is always ready to help you shape your code.

IntelliJ IDEA

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