Open Source Windows Software Development Software

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Browse free open source Software Development software and projects for Windows below. Use the toggles on the left to filter open source Software Development software by OS, license, language, programming language, and project status.

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1

MinGW - Minimalist GNU for Windows

A native Windows port of the GNU Compiler Collection (GCC)

MinGW: A native Windows port of the GNU Compiler Collection (GCC), with freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All of MinGW's software will execute on the 64bit Windows platforms.

223 Reviews

Downloads: 2,135,841 This Week

Last Update: 2021-09-05
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2

TortoiseSVN

An Apache SVN client, right where you need it most

TortoiseSVN is a Subversion (SVN) client, implemented as a windows shell extension. Which means it's available right where you need it: in the Windows file explorer. It's intuitive and easy to use, since it doesn't require the Subversion command line client to run. Simply the coolest Interface to (Sub)Version Control!

155 Reviews

Downloads: 362,505 This Week

Last Update: 11 hours ago
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3

SAP NetWeaver Server Adapter for Eclipse

Integrates Eclipse with the SAP NetWeaver Application Server

Integrates Eclipse with the SAP NetWeaver Application Server.

39 Reviews

Downloads: 281,427 This Week

Last Update: 2016-07-20
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4

Notepad++ Plugin Manager

Notepad++ Plugin Manager

The nppPluginManager repository contains the legacy Plugin Manager for Notepad++, a tool that once allowed users to easily install, update, and remove plugins within the editor. It relied on a centrally hosted XML file that listed available plugins, which the manager compared against those already installed. Since 2019, however, the plugin is no longer actively maintained, and the supporting web service that provided plugin lists has been discontinued. Users are now encouraged to rely on Notepad++’s built-in plugin solution instead of this deprecated tool. This project is the old location for the plugin list for Notepad++ Plugin Manager. Please use https://github.com/bruderstein/npppluginmanager for any issues and current code

63 Reviews

Downloads: 109,253 This Week

Last Update: 2019-07-19
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5

SWIG

A code generator for connecting C/C++ with other programming languages

SWIG is a software development tool that connects programs written in C and C++ with a variety of high-level programming languages. SWIG is used with different types of target languages including common scripting languages such as Javascript, Perl, PHP, Python, Tcl and Ruby. The list of supported languages also includes non-scripting languages such as C#, D, Go language, Java, Lua, OCaml, Octave, R and Scilab as well as the Guile implementation of the Scheme language. SWIG is most commonly used to create high-level interpreted or compiled programming environments, user interfaces, and as a tool for testing and prototyping C/C++ software. SWIG is typically used to parse C/C++ interfaces and generate the 'glue code' required for the above target languages to call into the C/C++ code. SWIG can also export its parse tree in the form of XML.

25 Reviews

Downloads: 43,569 This Week

Last Update: 2025-12-07
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6

Dev-C++

A free, portable, fast and simple C/C++ IDE

A new and improved fork of Bloodshed Dev-C++

141 Reviews

Downloads: 39,931 This Week

Last Update: 2016-11-29
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7

Code::Blocks

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

155 Reviews

Downloads: 37,504 This Week

Last Update: 15 hours ago
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8

GnuWin

Provides native Win32 open source ports and utilities

GnuWin provides Win32-versions of GNU tools, or tools with a similar open source licence. The ports are native ports, relying only on libraries provided with any modern 32-bits MS-Windows operating system, such as 2000 / XP / Vista / 7

78 Reviews

Downloads: 39,282 This Week

Last Update: 2015-05-20
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9

libjpeg-turbo

SIMD-accelerated libjpeg-compatible JPEG codec library

libjpeg-turbo is a JPEG image codec that uses SIMD instructions (MMX, SSE2, NEON, AltiVec) to accelerate baseline JPEG compression and decompression on x86, x86-64, ARM, and PowerPC systems. On such systems, libjpeg-turbo is generally 2-6x as fast as libjpeg, all else being equal. On other types of systems, libjpeg-turbo can still outperform libjpeg by a significant amount, by virtue of its highly-optimized Huffman coding routines. In many cases, the performance of libjpeg-turbo rivals that of proprietary high-speed JPEG codecs. libjpeg-turbo implements both the traditional libjpeg API as well as the less powerful but more straightforward TurboJPEG API. libjpeg-turbo also features colorspace extensions that allow it to compress from/decompress to 32-bit and big-endian pixel buffers (RGBX, XBGR, etc.), as well as a full-featured Java interface.

16 Reviews

Downloads: 38,217 This Week

Last Update: 2024-01-13
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10

Boost C++ Libraries

Free peer-reviewed portable C++ source libraries

Boost provides free portable peer-reviewed C++ libraries. The emphasis is on portable libraries which work well with the C++ Standard Library. See http://www.boost.org

103 Reviews

Downloads: 39,249 This Week

Last Update: 2026-04-17
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11

Tcl

The Tool Command Language implementation

Tool Command Language (Tcl) is an interpreted language and very portable interpreter for that language. Tcl is embeddable and extensible, and has been widely used since its creation in 1988 by John Ousterhout. Bug reports to http://core.tcl.tk/tcl/ Follow code development at http://core.tcl.tk/tcl/

49 Reviews

Downloads: 32,252 This Week

Last Update: 3 days ago
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12

cc-switch

A cross-platform desktop All-in-One assistant tool for Claude Code

cc-switch is a cross-platform desktop assistant designed to unify and streamline the management of multiple AI coding tools such as Claude Code, Codex, OpenCode, and Gemini CLI within a single interface. The application focuses on improving developer productivity by providing centralized configuration, provider switching, and workflow orchestration across different AI backends. Built as a modern desktop app using Tauri and web technologies, it enables users to manage credentials, sessions, and tool settings without manually editing configuration files. The project also includes advanced reliability features such as automatic failover, local proxy routing, and usage monitoring to help maintain stable AI tool operations. With ongoing updates adding session management, backup controls, and expanded provider support, cc-switch is positioned as a power-user control center for AI-assisted development environments.

Downloads: 7,550 This Week

Last Update: 2 days ago
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13

WinMerge

Windows visual diff and merge for files and directories

WinMerge is a Windows tool for visual difference display and merging, for both files and directories. It is highly useful for determining what has changed between file versions, and then merging those changes. WinMerge has Unicode support, Flexible syntax coloring editor, Visual SourceSafe integration, and Windows Shell integration. Regexp filtering for filenames and lines. Side-by-side line difference and highlights differences inside lines. A file map shows the overall file differences in a location pane. The user interface is translated into several languages.

193 Reviews

Downloads: 31,409 This Week

Last Update: 2026-05-27
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14

Notepad++ Plugins

A plugin to improve Notepad++

Notepad++ plugins is a collection of tools which plays a role of completion for Notepad++. This project contains Explorer, Function List, Hex Editor, Spell Checker and a console program NppExec. Other plugin developers are invited to share their projects

104 Reviews

Downloads: 24,112 This Week

Last Update: 2026-06-16
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15

Small Device C Compiler (SDCC)

The Small Device C Compiler (SDCC), targeting 8-bit architectures

SDCC is a retargettable, optimizing standard C (ANSI C89 / ISO C90, ISO C99, ISO C11 / C17, ISO C23, ISO C2y) compiler that targets a growing list of architectures: STM8, MCS-51, DS390, HC08, S08, 6502, 65C02, Z80, Z80N, Z180, Rabbit, SM83, TLCS-90, eZ80, R800, Padauk PDK14 and PDK15 microprocessors. There also is incomplete support for the Microchip PIC16 and PIC18 and the Padauk PDK13.

43 Reviews

Downloads: 22,642 This Week

Last Update: 2 hours ago
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16

NSIS: Nullsoft Scriptable Install System

Windows installer development tool

NSIS (Nullsoft Scriptable Install System) is a professional open source system to create Windows installers. It is designed to be as small and flexible as possible and is therefore very suitable for internet distribution. Being a user's first experience with your product, a stable and reliable installer is an important component of succesful software. With NSIS you can create such installers that are capable of doing everything that is needed to setup your software. NSIS is script-based and allows you to create the logic to handle even the most complex installation tasks. Many plug-ins and scripts are already available: you can create web installers, communicate with Windows and other software components, install or update shared components and more.

80 Reviews

Downloads: 20,478 This Week

Last Update: 2026-05-24
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17

Lazarus

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.

159 Reviews

Downloads: 18,891 This Week

Last Update: 41 minutes ago
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18

PSeInt

A tool for learning programming basis with a simple spanish pseudocode

PSeInt is a pseudo-code interpreter for spanish-speaking programming students. Its main purpose is to be a tool for learning and understanding the basic concepts about programming and applying them with an easy understanding spanish pseudocode.

38 Reviews

Downloads: 18,959 This Week

Last Update: 2025-03-15
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19

Process Hacker

View and manage processes, services and more with this powerful tool.

Process Hacker is a free and open source process viewer. This multi-purpose tool will assist you with debugging, malware detection and system monitoring.

139 Reviews

Downloads: 15,983 This Week

Last Update: 2018-02-10
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20

Cutter

A unit testing framework for C and C++

Cutter is a Unit Testing Framework for C and C++. Interface of Cutter is easy to write and easy to debug your code.

2 Reviews

Downloads: 32,889 This Week

Last Update: 2019-09-17
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21

Doxygen

Doxygen is a JavaDoc like documentation system for C++, C, Java and IDL.

52 Reviews

Downloads: 14,543 This Week

Last Update: 2026-04-30
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22

WampServer

A Windows Web development environment for Apache, MySQL, PHP databases

WampServer is a Web development platform on Windows that allows you to create dynamic Web applications with Apache2, PHP, MySQL and MariaDB. WampServer automatically installs everything you need to intuitively develope Web applications. You will be able to tune your server without even touching its setting files. Best of all, WampServer is available for free (under GPML license) in both 32 and 64 bit versions. Wampserver is not compatible with Windows XP, SP3, or Windows Server 2003.

142 Reviews

Downloads: 14,792 This Week

Last Update: 2 days ago
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23

GnuCOBOL

A free COBOL compiler

GnuCOBOL (formerly OpenCOBOL) is a free, modern COBOL compiler. GnuCOBOL implements a substantial part of the COBOL 85, X/Open COBOL and newer ISO COBOL standards (2002, 2014, 2023), as well as many extensions included in other COBOL compilers (IBM COBOL, MicroFocus COBOL, ACUCOBOL-GT and others). GnuCOBOL translates COBOL into C and internally compiles the translated code using a native C compiler. Build COBOL programs on various platforms, including GNU/Linux, Unix, Mac OS X, and Microsoft Windows. GnuCOBOL has also been built on HP/UX, z/OS, SPARC, RS6000, AS/400, along with other combinations of machines and operating systems. Copyright 2001-2024 Free Software Foundation, Inc. The cobc compiler is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the FSF; either version 3, or (at your option) any later version. The libcob run time support source tree is licensed under the GNU LGPL.

63 Reviews

Downloads: 13,606 This Week

Last Update: 16 hours ago
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24

MarkText

A simple and elegant markdown editor

MarkText is an MIT licensed open source project, and the latest version will always be downloadable for free from the GitHub release page. MarkText is still in development, and its development is inseparable from all sponsors. Realtime preview (WYSIWYG) and a clean and simple interface to get a distraction-free writing experience. Support CommonMark Spec, GitHub Flavored Markdown Spec and selective support Pandoc markdown. Markdown extensions such as math expressions (KaTeX), front matter and emojis. Support paragraphs and inline style shortcuts to improve your writing efficiency. Output HTML and PDF files. Various themes: Cadmium Light, Material Dark etc. Various editing modes: Source Code mode, Typewriter mode, Focus mode. Paste images directly from clipboard.

1 Review

Downloads: 2,934 This Week

Last Update: 2026-06-05
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25

WindTerm

A professional cross-platform SSH/Sftp/Shell/Telnet/Serial terminal

A Quicker and better SSH/Telnet/Serial/Shell/Sftp client for DevOps. WindTerm is a partial open source project, and the source will be gradually opened. Open source code includes, but is not limited to, the classes that can be used independently, such as functional, algorithms, GUI widgets, etc., as well as functional libraries, such as networks, protocols, etc., as well as all types that require open source according to the license. SSH v2, Telnet, Raw TCP, Serial, Shell protocols were implemented. Supports SSH auto-execution when the session is authenticated. Integrated local file manager, supports the move to, copy to, copy from, remove, rename, make new file/directory and so on. Supports Windows Cmd, PowerShell and Cmd, PowerShell as administrator. Supports Linux bash, zsh, PowerShell core, and so on. Supports MacOS bash, zsh, PowerShell core, and so on.

Downloads: 2,788 This Week

Last Update: 2025-03-11
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