Eclipse started as a Java IDE, but has since grown to be much, much more. Eclipse projects now cover static and dynamic languages; thick-client, thin-client, and server-side frameworks; modeling and business reporting; embedded and mobile; and, yes, we still have the best Java IDE.

Eclipse is the most popular and widely used IDE. It supports Java, PHP, C / C++, Mobile, Rich client applications, Modeling tools.

Eclipse

Oni is a new kind of editor, focused on maximizing productivity - combining modal editing with features you expect in modern editors. Oni is built with neovim, and inspired by VSCode, Atom, LightTable, and Emacs. The vision of Oni is to build an editor that allows you to go from thought to code as easily as possible - bringing together the raw editing power of Vim, the feature capabilities of Atom/VSCode, and a powerful and intuitive extensibility model - wrapped up in a beautiful package. This repository is under active development, and until 1.0 please consider everything unstable.
 
<ul>
<li>Modern UX - The Vim experience should not be compromised by terminal limitations.</li>
<li>Rich plugin development - using JavaScript, instead of VimL.</li>
<li>Cross-platform support - across Windows, OS X, and Linux.</li>
<li>Batteries included - rich features are available out of the box - minimal setup needed to be productive.</li>
<li>Performance - no compromises, Vim is fast, and Oni should be fast too.</li>
<li>Ease Learning Curve - without sacrificing the Vim experience.</li>
</ul>

Oni is a new kind of editor, focused on maximizing productivity - combining modal editing with features you expect in modern editors. Oni is built with neovim, and inspired by VSCode, Atom, LightTable, and Emacs. The vision of Oni is to build an editor that allows you to go from thought to code as easily as possible - bringing together the raw editing power of Vim, the feature capabilities of Atom/VSCode, and a powerful and intuitive extensibility model - wrapped up in a beautiful package. This repository is under active development, and until 1.0 please consider everything unstable.

Oni - new kind of editor, powered by Neovim

Codebox is a complete and modular Cloud IDE. It is an open source component of codebox.io (Cloud IDE as a Service).The IDE can run on your desktop (Linux or Mac), on your server or the cloud. Codebox is built with web technologies: node.js, javascript, html and less. The IDE possesses a very modular and extensible architecture, that allows you to build your own features with through add-ons. 

Codebox - Open source Cloud & Desktop IDE

Theia is an extensible platform to develop full-fledged multi-language Cloud & Desktop IDE-like products with state-of-the-art web technologies. Theia is entirely written in TypeScript and clearly separates the UI frontend from the backend. The frontend runs in modern browsers or as a Desktop app using Electron with either local or remote (cloud) backends. 
 
Theia provides the VS Code experience in the browser. It integrates a full featured terminal, that reconnects on browser reload keeping the full history. Theia is based on a state-of-the-art web-based technology stack. It provides language support via LSP and DAP.

Theia is an extensible platform to develop full-fledged multi-language Cloud & Desktop IDE-like products with state-of-the-art web technologies.  Theia is entirely written in TypeScript and clearly separates the UI frontend from the backend. The frontend runs in modern browsers or as a Desktop app using Electron with either local or remote (cloud) backends. 

Theia - Cloud & desktop IDE framework implemented in TypeScript

Run VS Code on any machine anywhere and access it in the browser. It helps to code on any device with a consistent development environment. Use cloud servers to speed up tests, compilations, downloads, and more


Code Server - VS Code in the browser

Gitpod is an open-source Kubernetes application for ready-to-code developer environments that spins up fresh, automated dev environments for each task, in the cloud, in seconds. It enables you to describe your dev environment as code and start instant, remote and cloud-based developer environments directly from your browser or your Desktop IDE.
 
Gitpod continuously builds your git branches like a CI server so that you can start coding right away - no more waiting for dependencies to download and builds to finish. Tightly integrated with GitLab, GitHub, and Bitbucket, Gitpod automatically and continuously prebuilds dev environments for all your branches. As a result, team members can instantly start coding with fresh, ephemeral and fully-compiled dev environments - no matter if you are building a new feature, want to fix a bug or do a code review.

Gitpod is an open-source Kubernetes application for ready-to-code developer environments that spins up fresh, automated dev environments for each task, in the cloud, in seconds. It enables you to describe your dev environment as code and start instant, remote and cloud-based developer environments directly from your browser or your Desktop IDE.



Gitpod - Automates the provisioning of ready-to-code development environments

A free, open-source Integrated Development Environment for software developers. You get all the tools you need to create professional desktop, enterprise, web, and mobile applications with the Java language, as well as C/C++, PHP, JavaScript, Groovy, and Ruby. It easy to install and use straight out of the box and runs on many operating systems including Windows, Linux, Mac OS X and Solaris. The NetBeans IDE 6.8 is the first integrated development environment to provide complete support of Java EE 6 and the GlassFish Enterprise Server v3 platform. Developers hosting their open-source projects on kenai.com benefit from improved instant messenging and issue tracking integration in the IDE, including full support for JIRA. Other improvements include new powerful C/C++ profiling features, support for web application development with PHP 5.3 and the Symfony framework, and improved code completion, hints and navigation in JavaFX projects.

An IDE to create professional desktop, enterprise, web, and mobile applications with the Java language, as well as C/C++, PHP, JavaScript, Groovy, and Ruby.

NetBeans

CodeLite is an open source, free, cross platform IDE for the C/C++ programming languages which runs on all major Platforms. It has generic support for compilers with built-in support for GCC/clang/VC++, GDB Support,  Refactoring, Code Navigation,  Source Control Plugins,  RAD Tool for wxWidgets,  Code Completion and lot more. 

CodeLite - Cross Platform IDE for C/C++

Visual Studio Code is a new type of tool that combines the simplicity of a code editor with what developers need for their core edit-build-debug cycle. Code provides comprehensive editing and debugging support, an extensibility model, and lightweight integration with existing tools.
 
 VS Code has many of the features developers need in a code and text editor, including navigation, keyboard support with customizable bindings, syntax highlighting, bracket matching, auto indentation, and snippets, with support for dozens of languages.
 
It supports following languages HTML, Objective-C, Coffee Script, Lua, Perl, Visual Basic, TypeScript, HandleBars, Ruby, XML, SQL, PHP, JSON, Groovy, PowerShell, Java, Razor, Batch, Less, C#, Sass, Dockerfile, Clojure, Jade, CSS, Python, F#, R, Ini, C++, Rust, JavaScript, Swift, Makefile, Go, Markdown

Visual Studio Code is a new type of tool that combines the simplicity of a code editor with what developers need for their core edit-build-debug cycle. Code provides comprehensive editing and debugging support, an extensibility model, and lightweight integration with existing tools. 

Visual Studio Code - Code editing. Redefined

Brackets is a modern text editor that makes it easy to design in the browser. It's crafted from the ground up for web designers and front-end developers. It supports Inline editing, Preprocessor like LESS and SCSS support, Live preview support, make changes to CSS and HTML and you can instantly see those changes on screen.

Brackets - An open source code editor for the web, written in JavaScript, HTML and CSS

Eclipse Che is a developer workspace server and cloud IDE. Che defines workspaces that include their dependencies including embedded containerized runtimes, Web IDE, and project code. This makes workspaces distributed, collaborative, and portable to run anywhere on a desktop or a server. All Che services are reachable through RESTful APIs. 

Eclipse Che - Next-Generation IDE

Kdevelop is a free, open source IDE (Integrated Development Environment) for MS Windows, Mac OS X, Linux, Solaris and FreeBSD. It is a feature-full, plugin extensible IDE for C/C++ and other programming languages. It is based on KDevPlatform, and the KDE and Qt libraries and is under development since 1998. It supports  15 languages including Ada, C, C++, Objective-C (via C support), SQL, Fortran, Haskell, Java, PHP, Pascal, Perl, Python, Ruby, Bash, XUL (unofficially). Its feature include Itegrated Debugger, Code Editing, Supported VCS systems: CVS, Perforce, Subversion and Clearcase, Documentation viewer, Code Snippets, Doxygen integration, RAD tools, Valgrind integration etc.

Kdevelop is a free, open source IDE (Integrated Development Environment) for MS Windows, Mac OS X, Linux, Solaris and FreeBSD. It is a feature-full, plugin extensible IDE for C/C++ and other programming languages. It is based on KDevPlatform, and the KDE and Qt libraries and is under development since 1998.

Kdevelop

Padre is a Perl IDE, an Integrated Development environment, or in other words a text editor that is simple to use for new Perl programmers but also supports large multi-lingual and multi-technology projects. Its features include:
 <UL>
	<LI>Syntax highlighting</LI>
	<LI>Multi-document editing</LI>
	<LI>Remote editing via FTP (#12), HTTP, and SSH </LI>
	<LI>Syntax checking for Perl 5 and Perl 6</LI>
	<LI>Debugger supports Stepping, Breakpoints, Watches, Variable evaluation, Stack module </LI>
	<LI>Refactoring</LI>
	<LI>Support for creating and running unit tests</LI>
	<LI>Context sensitive help</LI>
	<LI>Regex Editor for building and debugging regular expressions </LI>
	<LI>Integrated version control</LI>
	<LI>Incremental search</LI>
	<LI>Code browser </LI>
	<LI>Integrated web server for CGI testing</LI>
 </UL>

Padre is a Perl IDE, an Integrated Development environment, or in other words a text editor that is simple to use for new Perl programmers but also supports large multi-lingual and multi-technology projects.

Padre

EPIC is Perl IDE (including editor and debugger) based on the Eclipse platform, compatible with Windows, Linux and Mac OS X. Whether you are into CGI scripting or full-fledged Perl projects with hundreds of modules, EPIC is the most feature-rich and extensible free Perl IDE available today. Its features include:
 <UL>
	<LI>Syntax highlighting </LI>
	<LI>On-the-fly syntax check </LI>
	<LI>Content assist </LI>
	<LI>Quick reference feature </LI>
	<LI>Outline view</LI>
	<LI>Source formatter</LI>
	<LI>Perldoc support</LI>
	<LI>Templating support</LI>
	<LI>Persistent breakpoints </LI>
	<LI>Single Step/Step Into/Step Over</LI>
	<LI>Global and local variables inspection</LI>
	<LI>Expression evaluation</LI>
	<LI>RegExp Plug-in</LI>
 </UL>

EPIC is Perl IDE (including editor and debugger) based on the Eclipse platform, compatible with Windows, Linux and Mac OS X. Whether you are into CGI scripting or full-fledged Perl projects with hundreds of modules, EPIC is the most feature-rich and extensible free Perl IDE available today.

EPIC

Spyder is a Python development environment with advanced editing, interactive testing, debugging and introspection features. It is especially recommended for scientific computing thanks to NumPy (linear algebra), SciPy (signal and image processing), matplotlib (interactive 2D/3D plotting) and MayaVi’s mlab (interactive 3D visualization) support. Spyder may also be used as an extension library providing powerful console-related PyQt4 widgets. Spyder is part of spyderlib, a Python module based on PyQt4 and QScintilla2.

Spyder is a Python development environment with advanced editing, interactive testing, debugging and introspection features. It is especially recommended for scientific computing thanks to NumPy (linear algebra), SciPy (signal and image processing), matplotlib (interactive 2D/3D plotting) and MayaVi’s mlab (interactive 3D visualization) support.

Spyder

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