Open Source Eclipse Alternatives

GNU Emacs is an extensible and customizable, free and open source text editor. It was created by GNU Project founder Richard Stallman and has been dubbed "the most powerful text editor available today". At the core of GNU Emacs is an interpreter for Emacs Lisp, a dialect of the Lisp programming language with extensions to support text editing. Which allows users to extend and customize GNU Emacs to their heart's content.

A free and open source IDE based on Electron and Atom, developed by Microsoft. Visual Studio Code or VS Code is an extensible IDE or coding editor that is loved by many developers around the globe. The editor combines a streamlined UI with advanced code assistance, code nagivation and intellisense.

Vim dates back all the way to 1991 when Vim's author, Bram Moolenaar released it to the public. Vim is a highly configurable text editor built to enable efficient text editing. The software is released as free and open-source software under the Vim License. Vim is often called a "programmer's editor," as it relies more on customization of shortcuts and makes heavy use of macros that can be combined with muscle memory to achieve maximum proficiency. Vim was designed for use in both command-line interfaces and as a standalone application in a graphical user interface.

Apache NetBeans is free and open-source IDE that combines development environment, a tooling platform and application framework into one package. With Apache NetBeans developer can build applications with Java, JavaScript, PHP, HTML5, CSS, and other languages. Apache NetBeans also features code highlighting, both syntactically and semantically, while also letting developers refactor code with a wide range of powerful and handy tools. The software is openly developed by the Apache Foundation and is available for macOS, Linux, Windows and BSD.

A free and open-source lightweight GUI text editor using Scintilla and GTK with basic IDE features. Geany is designed and developed with performance in mind, and provides limited dependency on separate packages or external libraries on Linux. Geany is available for a wide variety of operating systems including BSD, Linux, macOS, Solaris and Windows.

VSCodium is a community-driven, freely-licensed binary distribution of Microsoft’s editor VSCode. VSCodium is built on the same source code as VSCode, but with telemetry and tracking removed before it is packaged as an application. VSCodium is released under the MIT license and is a great way to use VSCode without being tracked by Microsoft.

PyCharm is an integrated development environment (IDE) designed and developed by JetBrains specifically for the programming language Python. With PyCharm you can boost code quality and write maintainable code while maintain standards with PEP8 checks, testing assistance and smart refactoring. PyCharm also provides thorough intellisense with smart code completion, code inspection and real-time error highlighting. PyCharm is released as a commercial software but can be obtained for free as PyCharm Community Edition with a minimal limited feature set that close resembles the commercial version.

MonoDevelop is a free and open-source IDE (Integrated Development Environment) for macOS, Linux and Windows. The software primary focus is to provide and IDE specifically for Mono and .NET frameworks. MonoDevelop features intellisense automatic code completion, source control, a graphical user interface.

With Aptana Studio you can build web applications quickly and easily using an industry leading web application IDE. Aptana utilize the power of the IDE Eclipes and levrages it into a powerful web development engine. Aptana Studio allows you to write HTML, CSS, JavaScript, PHP, and Ruby, with support for the latest HTML5 specifications. Includes information about the level of support for each element in the major web browsers.

CodeLite is a free and open source, cross-platform code editor. With CodeLite you can write C, C++, PHP, and JavaScript applications. CodeLite is used mainly bybackend developers using Node.js.

Light Table is an IDE (integrated development environment) for software development. The application is built by Chris Granger and Robert Attorri and features real-time feedback allowing instant execution, debugging and access to documentation.

jEdit is a mature programmer's text editor written in Java. The editor is released as free and open source software under the GNU General Public License version 2.0. With jEdit you can enjoy features like auto indentation and syntax highlighting for more than 200 languages. jEdit also provides a Plugin Manager that allows jEdit users to install, upgrade, and remove plugins without leaving the editor.