Open Source Windows System Software

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

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1

AutoClicker

A full-fledged autoclicker with two modes of autoclicking

A full-fledged autoclicker with two modes of autoclicking, at your dynamic cursor location or at a prespecified location. The maximum amounts of clicked can also be set (or left as infinite). Hotkeys work in the background for convenience. If you need to automate multiple mouse clicks, try this multiple auto clicker: https://sourceforge.net/projects/orphamielautoclicker/files/AutoClickers.exe/download Whats new in v1.0.0.2: 1. You can now change your hotkeys! 2. Changed the about page 3. Added a few minor options v1.0.0.1 : 1. Your settings are now saved from your last session so you only need to enter them once. (Includes last fixed location) 2. Added double clicking and triple clicking 3. Added Right clicking and middle clicking

221 Reviews

Downloads: 677,967 This Week

Last Update: 2025-11-09
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2

CrystalDiskInfo

A HDD/SSD utility software

A HDD/SSD utility software which supports a part of USB, RAID and NVMe.

18 Reviews

Downloads: 345,046 This Week

Last Update: 2026-06-05
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3

Ventoy

A New Bootable USB Solution

Ventoy is an open source tool to create bootable USB drive for ISO/WIM/IMG/VHD(x)/EFI files. With Ventoy, you don't need to format the disk over and over, you just need to copy the ISO/WIM/IMG/VHD(x)/EFI files to the USB drive and boot them directly. You can copy many files at a time and Ventoy will give you a boot menu to select them. You can also browse ISO/WIM/IMG/VHD(x)/EFI files in local disks and boot them. x86 Legacy BIOS, IA32 UEFI, x86_64 UEFI, ARM64 UEFI and MIPS64EL UEFI are supported in the same way. Most types of OS supported (Windows/WinPE/Linux/ChromeOS/Unix/VMware/Xen...) 1100+ ISO files are tested, 90%+ distros in distrowatch.com supported.

48 Reviews

Downloads: 217,072 This Week

Last Update: 2026-06-25
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4

TurboVNC

High-speed, 3D-friendly, TightVNC-compatible remote desktop software

TurboVNC is a high-performance, enterprise-quality version of VNC based on TightVNC, TigerVNC, and X.org. It contains a variant of Tight encoding that is tuned for maximum performance and compression with 3D applications (VirtualGL), video, and other image-intensive workloads. TurboVNC, in combination with VirtualGL, provides a complete solution for remotely displaying 3D applications with interactive performance. TurboVNC's high-speed encoding methods have been adopted by TigerVNC and libvncserver, and TurboVNC is also compatible with any other TightVNC derivative. TurboVNC forked from TightVNC in 2004 and still covers all of the TightVNC 1.3.x features, but TurboVNC contains numerous feature enhancements and bug fixes relative to TightVNC, and it compresses 3D and video workloads much better than TightVNC while using generally only 5-20% of the CPU time of the latter. Using non-default settings, TurboVNC can also be made to compress 2D workloads as "tightly" as TightVNC.

16 Reviews

Downloads: 134,747 This Week

Last Update: 2024-01-13
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5

Info-ZIP project

Info-ZIP portable compression/archiver utilities

Info-ZIP portable compression/archiver utilities (Zip, UnZip, WiZ, etc.)

17 Reviews

Downloads: 111,427 This Week

Last Update: 2021-04-08
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6

Scrollout F1

An easy-to-use anti-spam email gateway

• Designed for Linux and Windows email system administrators, Scrollout F1 is an easy to use, already adjusted email firewall (gateway) offering free anti-spam and anti-virus protection aiming to secure existing email servers, old or new, such as Microsoft Exchange, Lotus Domino, Postfix, Exim, Sendmail, Qmail and others. • Built-in multilayer security levels make configuration effort equal to a car radio. • It combines simplicity with effective protection using powerful open source with additional set of rules & filters. • Available as 64bit: - ISO image (Internet connection required during installation) - install from scratch (Internet connection required during installation). • Minimum Requirements (for 5,000 messages/day): 1 GB of RAM 30 GB storage drive 1 Processor x86/AMD64 1 Ethernet x 1 IPv4 address UDP ports: 53 123 4500 6277 24441 TCP ports: 25 80 443 2703

85 Reviews

Downloads: 95,635 This Week

Last Update: 2018-04-08
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7

CrystalDiskMark

A simple disk benchmark software

A simple disk benchmark software.

13 Reviews

Downloads: 107,243 This Week

Last Update: 2026-06-05
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8

d-apt

APT repository to easily install/upgrade D binary packages

"d-apt" is an APT repository to easily install/upgrade D binary packages on systems like Debian, Ubuntu, LinuxMint, etc.

Downloads: 365,200 This Week

Last Update: 2026-06-09
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9

IDM Trial Reset

Use IDM forever without cracking

IDM Trial Reset is a lightweight utility designed to reset the trial period of Internet Download Manager (IDM), allowing users to continue using the software without immediate license enforcement. Built using AutoIt, the tool automates registry and system-level modifications required to remove or reset trial-related data. It provides a simple interface or executable that performs the reset process without requiring deep technical knowledge from the user. The project emphasizes ease of use and portability, enabling users to run the tool whenever the trial period expires. While it does not modify the core IDM software, it interacts with system configurations to extend usability, and the repository encourages users to purchase a license if possible. Its open-source nature allows users to inspect or rebuild the executable themselves, increasing transparency.

1 Review

Downloads: 12,210 This Week

Last Update: 2026-03-20
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10

7-Zip

A free file archiver for extremely high compression

7-Zip is a file archiver with a high compression ratio. 7-Zip works in Windows 11 / 10 / 8 / 7 / Vista / XP / 2022 / 2019 / 2016 / 2012 / 2008 / 2003 / 2000. You can use 7-Zip on any computer, including a computer in a commercial organization. You don't need to register or pay for 7-Zip. And there is command line version for Linux and macOS. Most of the source code is under the GNU LGPL license. The unRAR code is under a mixed license with GNU LGPL + unRAR restrictions. Check the license for details.

831 Reviews

Downloads: 39,205 This Week

Last Update: 2026-04-29
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11

PINN

PINN is an enhancement of NOOBS

PINN is an enhancement of NOOBS for the Raspberry Pi. It allows the installation of MULTIPLE OSes on the same SD/HDD/SSD device with an OS chooser when booting. Built-in Admin tools allow you to backup & restore your OSes and fix OS problems by including basic disk checking, password changing, and a command shell.

16 Reviews

Downloads: 37,354 This Week

Last Update: 2026-04-29
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12

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: 31,791 This Week

Last Update: 2026-05-27
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13

GPT fdisk

GPT fdisk is a disk partitioning tool loosely modeled on Linux fdisk, but used for modifying GUID Partition Table (GPT) disks. The related FixParts utility fixes some common problems on Master Boot Record (MBR) disks.

17 Reviews

Downloads: 29,286 This Week

Last Update: 2026-06-15
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14

Ufficio Zero Linux OS

Linux Desktop OS for professionals

Ufficio Zero Linux OS is a desktop operating system offered in many versions based on PCLinuxOS, Linux Mint and Devuan. We also have created Duplica, a Bare Metal Restore Solution. This distro has many packages for professional use. The project is managed by the Italian company SIITE SRLS and promoted by the Italian Association Boost Media APS. Ufficio Zero Linux OS is trademarked through the Linux Mark Institute. All rights reserved. Linux® is the registered trademark of Linus Torvalds in the U.S. and other countries. website https://ufficiozero.org forum https://citiverse.it/category/211/ufficio-zero-linux-forum-di-supporto wiki https://wiki.ufficiozero.org Follow us on our socials https://littlelink.boostmedia.it/ufficiozero/ Boost Media APS https://boostmedia.it

4 Reviews

Downloads: 41,959 This Week

Last Update: 11 hours ago
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15

net-snmp

Net-SNMP provides tools and libraries relating to the Simple Network Management Protocol including: An extensible agent, an SNMP library, tools to request or set information from SNMP agents, tools to generate and handle SNMP traps, etc.

32 Reviews

Downloads: 23,866 This Week

Last Update: 2025-12-23
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16

GParted

A partition editor to graphically manage disk partitions

GNOME Partition Editor for creating, reorganizing, and deleting disk partitions. It uses libparted from the parted project to detect and manipulate partition tables. Optional file system tools permit managing file systems not included in libparted.

114 Reviews

Downloads: 24,128 This Week

Last Update: 4 hours ago
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17

Webmin

A web-based interface for system administration of UNIX

A web-based system administration tool for Unix servers and services. https://github.com/webmin/webmin

83 Reviews

Downloads: 22,034 This Week

Last Update: 5 days ago
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18

PowerShell

Command-line shell and scripting language built on .NET

Powershell is a cross-platform, task-based command-line shell and scripting language that helps rapidly automate tasks that manage operating systems (Linux, macOS and Windows) and processes. It works well with existing tools and is optimized for dealing with structured data, REST APIs and object models. PowerShell was developed by Microsoft as a task management and configuration management framework. Powershell is designed to let you manage computers from the command line and improve the command-line and scripting environment.

1 Review

Downloads: 4,396 This Week

Last Update: 2026-06-16
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19

TGM Gaming Macro

Lets you have a macro mouse n keyboard functionally with ordinary one.

Official TGMacro Websites: 🌐 https://trksyln.net/projects/TGM-Gaming-Macro-(TGMacro)-4 🌐 https://gettgmacro.com Looking for old version? 🌐 https://trksyln.net/projects/TGM-Gaming-Macro-(TGMacro)-4/#download ⚡ TGMacro turns any ordinary mouse and keyboard into powerful macro devices. Easily create or record multiple macros, assign each to different keys or key combinations, and trigger or loop them whenever you need—whether it’s rapid-fire actions in games, complex multi-step workflows, or simple shortcuts that save you time every day. 🎮 Designed for gamers, but versatile enough for everyday tasks—TGMacro gives you full control and flexibility. 💡 Questions, bug reports, or feature requests? Older versions: https://trksyln.net/contact Current version: https://gettgmacro.com/contact Discord channel: https://discord.gg/gJ5ZNt4AAW https://gettgmacro.com/GetStarted

49 Reviews

Downloads: 25,781 This Week

Last Update: 2026-04-09
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20

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: 17,520 This Week

Last Update: 2026-05-24
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21

S.M.A.R.T. Monitoring Tools

Disk Inspection and Monitoring

smartmontools contains utility programs (smartctl, smartd) to control/monitor storage systems using the Self-Monitoring, Analysis and Reporting Technology System (S.M.A.R.T.) built into most modern ATA and SCSI disks. It is derived from smartsuite.

38 Reviews

Downloads: 21,311 This Week

Last Update: 4 days ago
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22

android-x86

A project to bring Android to the x86 platform

This is a project to port Android open source project to x86 platform, formerly known as "patch hosting for android x86 support". http://www.android-x86.org/

62 Reviews

Downloads: 20,831 This Week

Last Update: 2022-12-20
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23

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: 15,879 This Week

Last Update: 2018-02-10
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24

NetherSX2 Classic

Continuation of NetherSX2 based on AetherSX2 3668

NetherSX2-classic is a companion and variant of NetherSX2 that targets a specific older base version of the AetherSX2 emulator (based on the 3668 branch), applying similar custom patches to provide a stable and performant PS2 emulation environment on Android devices. The project stitches in anti-tampering modifications, RetroAchievements notification fixes, and controller and GameDB updates while maintaining the legacy behavior of the classic build for compatibility with titles that might perform better on the older codebase. Because this classic branch starts from a slightly different upstream version than NetherSX2-patch, users often choose it for performance reasons on lower-power devices or for games with known regressions in newer builds. As with the patch variant, the repository includes configuration changes, fixes for widescreen and deinterlacing behavior, and updated game and controller support developed by the community.

Downloads: 3,355 This Week

Last Update: 2026-01-05
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25

Metasploitable

Metasploitable is an intentionally vulnerable Linux virtual machine

This is Metasploitable2 (Linux) Metasploitable is an intentionally vulnerable Linux virtual machine. This VM can be used to conduct security training, test security tools, and practice common penetration testing techniques. The default login and password is msfadmin:msfadmin. Never expose this VM to an untrusted network (use NAT or Host-only mode if you have any questions what that means). To contact the developers, please send email to msfdev@metasploit.com

11 Reviews

Downloads: 16,359 This Week

Last Update: 2019-08-19
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