A free C, C++ and Fortran IDE
Code::Blocks is a free, open-source, cross-platform C, C++ and Fortran 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! We hope you enjoy using Code::Blocks! The Code::Blocks Team
A hackable text editor for the 21st Century
Atom is a text editor that's modern, approachable and full-featured. It's also easily customizable- you can customize it to do anything and be able to use it productively without ever touching a config file. Atom is free to download and runs on Linux, OS X and Windows with support for plug-ins written in Node.js and embedded Git Control. It is based on Electron (formerly known as Atom Shell),a framework for building cross-platform apps using Chromium and Node.js.
Powerful tool for modern apps: Django, Rails, Laravel, Node, Go, Java
Laragon makes coding more fun and easier. Instant setup - extremely fast, lightweight, intuitive, and powerful universal development enviroment for creating modern apps with many stacks: Ruby on Rails, Laravel, Django, Flask, MEAN and Spring Boot. Portable, reliable and Zero operation on MySQL, PostgreSQL, MongoDB, Memcached, Redis, PHP, Ruby, Python, Node.js and Java.
Rapid applications development tool and libraries for FPC
The Lazarus IDE is a stable and feature rich visual programming environment for the FreePascal Compiler. It supports the creation of self-standing graphical and console applications and runs on Linux, FreeBSD, MacOSX and Windows.
A modern, lightweight yet powerful text editor
Brackets is a free, modern open-source text editor made especially for Web Development. Written in HTML, CSS, and JavaScript with focused visual tools and preprocessor support, Brackets makes it easy for web designers and front-end developers to design in the browser. Its blend of visual tools ensures you get just the right amount of help when you want it without disrupting your creative process. It's the better, easier and more enjoyable way of writing code.
jVi is a vi/vim editor clone built on top of the javax.swing.text package. Available for NetBeans and JBuilder. jVi is designed to quickly and easily integrate into many disparate java based desktop apps, from IDE's to mail-news readers.
A lightweight programming environment for Java
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.
Python IDE
PyScripter is an open-source Python Integrated Development Environment (IDE) created with the ambition to become competitive in functionality with commercial IDEs available for other languages. It is a feature-rich but also lightweight. Please note that 64-bit installers and portable versions are available under "Files".
A free IDE for C#, VB.NET, & Boo projects on Microsoft's .NET platform
SharpDevelop is the open-source IDE for the .NET platform. Write applications in languages including C#, VB.NET, F#, IronPython and IronRuby, as well as target rich and reach: Windows Forms or WPF, as well as ASP.NET MVC and WCF. It starts from USB drives, supports read-only projects, comes with integrated unit and performance testing tools, Git, NuGet and a lot more features that make you productive as a developer.
Dev-C++ with wxWidgets designer
wxDev-C++ is an opensource wxWidgets Dialog designer that mimics the Delphi/Borland C++ Builder designer.
PyDev is a Python Development Environment (Python IDE plugin for Eclipse). It features an editor with code completion, code analysis, refactoring, outline view, debugger, mark occurrences and other goodies - check http://pydev.org for more details). It's kept going by community contributions, so, if you think it's a worthy project, please contribute through http://pydev.org
Lightweight and easy to use cross-platform C++ IDE
ZinjaI is a lightweight Cross-platform IDE for programming with C/C++, initially aimed to be used in classroom for learning C++, but powerful enough to manage complex projects as ZinjaI itself.
C++ IDE easy and complete.
Falcon C++ is a IDE that was developed to turn development of C++ applications easily.
We extend the Eclipse IDE with tools for development in Haskell, a functional programming language, providing support for a wide range of tools (compilers, interpreters, doc tools etc.) in a coherent, convenient and configurable environment.
Code::Blocks is an open-source cross-platform IDE (Integrated Development Environment) for C/C++. Designed with flexibility in mind, most of its features are provided by external modules (plugins) making it easily extendable and configurable.
IDLE Extensions
A collection of extensions for Python's IDLE, the Python IDE built with the tkinter GUI toolkit.
Open tool platform for the cost effective rigorous development of dependable complex software systems services. This platform is based on the event-B formal method and provides natural support for refinement and mathematical proof.
Kile is a feature-rich LaTeX editor
Kile is a LaTeX editor, a TeX shell that simplifies the creation of LaTeX documents.
HM NIS Edit is the best Editor/IDE for Nullsoft Scriptable Install System (NSIS). Its useful for experts and beginner in the creation of Setup programs with the NSIS.
Bluefish is a powerful editor for experienced web designers and programmers. Bluefish supports many programming and markup languages, but it focuses on editing dynamic and interactive websites.
EditBox is the Eclipse plugin for source code background highlighting. While most of plugins highlight the syntax of the source code, EditBox highlights the selected block of the code by changing its background color and drawing border around it.
Bricx Command Center (BricxCC) is a highly popular Windows-based IDE for programming LEGO programmable bricks using NQC as well as MindScript, LASM, C++, C, Pascal, Java, and Forth. Program the new NXT brick using NBC and NXC.
CodeLite: an open source, cross platform C/C++/PHP and JavaScript IDE
codelite is an open-source, cross platform IDE for the C/C++/PHP and JavaScript programming languages (build and tested on Windows 7, 8, ubuntu >=14.04 plus debian, fedora and openSUSE, and Mac OSX 10.8.4). codelite is distributed under the terms of the GPLv2 license If you need help with codelite, please join our forums at: http://forums.codelite.org Visit our download page at: http://codelite.org/support.php The CodeLite Team
FBIde is opensource IDE for FreeBasic compiler. Coded in C++ using wxWidgets library to be as portable as possible.