Browse free open source C# PC Cleaners and projects below. Use the toggles on the left to filter open source C# PC Cleaners by OS, license, language, programming language, and project status.

  • Skillfully - The future of skills based hiring Icon
    Skillfully - The future of skills based hiring

    Realistic Workplace Simulations that Show Applicant Skills in Action

    Skillfully transforms hiring through AI-powered skill simulations that show you how candidates actually perform before you hire them. Our platform helps companies cut through AI-generated resumes and rehearsed interviews by validating real capabilities in action. Through dynamic job specific simulations and skill-based assessments, companies like Bloomberg and McKinsey have cut screening time by 50% while dramatically improving hire quality.
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  • AestheticsPro Medical Spa Software Icon
    AestheticsPro Medical Spa Software

    Our new software release will dramatically improve your medspa business performance while enhancing the customer experience

    AestheticsPro is the most complete Aesthetics Software on the market today. HIPAA Cloud Compliant with electronic charting, integrated POS, targeted marketing and results driven reporting; AestheticsPro delivers the tools you need to manage your medical spa business. It is our mission To Provide an All-in-One Cutting Edge Software to the Aesthetics Industry.
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  • 1
    Hellzerg Optimizer

    Hellzerg Optimizer

    The finest Windows Optimizer

    Advanced configuration utility that helps you restore your privacy and increase your security. Optimizer is recommended after a fresh, clean installation of Windows to achieve maximum privacy and security. Depending on your version of Windows, Optimizer will also allow you to perform some specific tweaks.
    Downloads: 201 This Week
    Last Update:
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  • 2
    RyTuneX

    RyTuneX

    RyTuneX is a cutting-edge optimizer built with the WinUI 3 framework

    RyTuneX is a comprehensive Windows-system optimization tool aimed at users who want to enhance performance, privacy and usability on systems running Windows 10 (20H1 +) and Windows 11. It is built using the WinUI 3 framework and .NET 8 to provide a modern, responsive interface and native Windows look and feel. The application lets users “debloat” their system by removing pre-installed apps and Windows features that may be unnecessary or resource-heavy, helping free up resources and storage. It also offers system tweaks to improve responsiveness, reduce background overhead, and optimize system settings for gaming or heavy usage workflows. Privacy enhancements are part of its core offering: toggles for telemetry, data-collection features, background apps and more give users greater control over what their OS is tracking or doing under the hood.
    Downloads: 125 This Week
    Last Update:
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  • 3
    GTweak

    GTweak

    Portable Tool for an Ideal Windows Setup

    GTweak is a Windows optimization and customization utility designed to give users deep control over system behavior, privacy, and performance. It provides a wide range of tools to disable unnecessary services, reduce telemetry, and streamline the operating system for better efficiency. The software allows users to modify system settings that are typically hidden or difficult to access, making advanced tweaks more accessible. GTweak also includes features for removing pre-installed apps, managing updates, and customizing the Windows interface. It is particularly focused on privacy, enabling users to disable tracking, data collection, and background services from Microsoft and third parties. Overall, GTweak serves as an all-in-one toolkit for debloating, securing, and optimizing Windows environments.
    Downloads: 34 This Week
    Last Update:
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  • 4
    ET-Optimizer

    ET-Optimizer

    ET is a powerful application to improve performance

    ET-Optimizer is a performance optimization tool designed to enhance system responsiveness and efficiency by applying targeted configurations and tweaks to operating system settings and background processes. It focuses on improving performance in specific use cases such as gaming or real-time applications where latency and system overhead are critical factors. The tool typically includes scripts or automated routines that adjust system parameters, disable unnecessary services, and optimize resource allocation. It is designed for users who want to fine-tune their environment without manually modifying numerous system settings. The project emphasizes ease of use by bundling optimizations into a streamlined workflow that can be applied quickly. It also serves as a reference for understanding how different system configurations impact performance.
    Downloads: 21 This Week
    Last Update:
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  • The Most Powerful Software Platform for EHSQ and ESG Management Icon
    The Most Powerful Software Platform for EHSQ and ESG Management

    Addresses the needs of small businesses and large global organizations with thousands of users in multiple locations.

    Choose from a complete set of software solutions across EHSQ that address all aspects of top performing Environmental, Health and Safety, and Quality management programs.
    Learn More
  • 5
    CrapFixer

    CrapFixer

    Fixes the crap Windows leaves behind

    CrapFixer is a lightweight Windows cleanup and tweaking toolbox aimed at removing or reducing the everyday “junk” Windows accumulates, while keeping changes understandable and reversible. It’s positioned as a fast, no-fluff utility that focuses on practical fixes rather than turning into an overstuffed “optimizer” suite. The workflow is deliberately simple: you analyze your system, review what’s flagged, and then apply recommended changes with a single action. It distinguishes between items that are recommended to fix and items that are already optimized, helping you avoid unnecessary changes. The project emphasizes safety by making most tweaks undoable, and it supports running with administrator privileges when deeper changes (like certain registry locations) are required. For users who want more clarity, it includes a help lookup per tweak and offers log review so you can understand what happened and share results for troubleshooting.
    Downloads: 20 This Week
    Last Update:
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  • 6
    Windows 11 Fixer

    Windows 11 Fixer

    A tool to "Fix" Windows 11

    Windows 11 Fixer is a community-oriented Windows utility intended to centralize a wide range of customization, cleanup, and configuration tasks for Windows 11 into one user-friendly interface. It gives users a single place to tweak visual components like the taskbar and File Explorer, adjust system settings including privacy and security options, and uninstall unwanted default software that many consider bloatware. In addition to settings adjustments, the tool can automate the removal of applications such as Cortana or Edge, and also offers options to install commonly used third-party applications directly from within its UI. The application emphasizes ease of use, pulling together many tweaks that would otherwise require manual registry edits or piecemeal scripts, and it typically shows reminders when a reboot or process restart is needed for changes to take effect.
    Downloads: 4 This Week
    Last Update:
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  • 7
    Performance Maintainer

    Performance Maintainer

    cleans registry, cleanup disk, defrag drive

    Performance Maintainer has combined open source tools such as Little Registry Cleaner, Bleachbit and Ultradefrag that run periodically for PC maintenance and performance. It is very simple and automated 1.Little Registry Cleaner Scan and Cleans the registry, 2.Bleachbit Performs Disk Cleanup 3. Ultradefrag defragments System Drive. The Programs also allows to install additional tools for tweaking and better performance. The installer schedules the program to run according to your requirement. Requires .NET Framework 3.5 sp1.
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    Downloads: 26 This Week
    Last Update:
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  • 8
    Cleaner PRO

    Cleaner PRO

    Simple Windows cleanup utility

    Cleaner PRO is a universal utility for cleaning Windows.
    Downloads: 2 This Week
    Last Update:
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  • 9

    Merc-Clean-GUI

    A Windows desktop application (WinForms) that provides a one-stop GUI

    Features - Run All : Sequentially executes a full suite of scans and cleanups: 1. SFC (sfc /scannow) 2. DISM CheckHealth, ScanHealth, RestoreHealth 3. Clear temporary files, browser caches 4. Disk Cleanup 5. Drive optimization 6. DNS cache flush - Individual Maintenance Tasks: Each function—SFC, DISM, Clear Temp, etc.—is available as a separate button. - Kill Process : Allows you to cancel a currently running maintenance operation at any time, including stopping the entire “Run All” sequence. - Detailed Terminal Output: Displays real-time command output (stdout/stderr) in a terminal-like text box, so you can monitor progress and see any errors. Links & Credits - Quick buttons to open relevant websites or show credits.
    Downloads: 30 This Week
    Last Update:
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  • Collect! is a highly configurable debt collection software Icon
    Collect! is a highly configurable debt collection software

    Everything that matters to debt collection, all in one solution.

    The flexible & scalable debt collection software built to automate your workflow. From startup to enterprise, we have the solution for you.
    Learn More
  • 10
    Tasks

    Tasks

    Tasks is an application that optimizes computer performance

    Tasks is an application that improves computer performance. Tasks's main features include an advanced cleanup tool, a startup manager, and a detailed Task Manager. These tools help improve computer performance, system boot times, and ensures a faster experience while using your computer. We aim to make a lightweight, free, intuitive and responsive cleaning tool. We believe that computer performance is crucial to everyone and should not include any hidden paywalls inside the application. Our goal is to make a tool that anyone can use from anywhere. View detailed information about programs that run on start. (Name, Description, Directory) Create new programs that run on start. Remove malicious programs that run on start with one click. View detailed information about services that run on start. (Name, Service, Stopped or Running) Open the startup folder with one click. Clean and understandable interface to see all startup processes and services.
    Downloads: 1 This Week
    Last Update:
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  • 11
    Windows Memory Cleaner (WMC)

    Windows Memory Cleaner (WMC)

    Free RAM cleaner uses native Windows features to optimize memory areas

    Windows Memory Cleaner (aka WMC or WinMemoryCleaner) is a lightweight, portable Windows utility designed to optimize system memory using native Windows API functions. It provides a transparent and user-friendly interface for freeing up RAM that is often held unnecessarily by cached data or inefficient processes. Unlike many “RAM booster” tools, it relies entirely on documented system methods rather than hidden tricks or unsafe optimizations. The application can automatically clean memory based on time intervals or when available RAM drops below a defined threshold. It also supports both GUI usage and command-line automation, making it suitable for everyday users and advanced workflows alike. Overall, WinMemoryCleaner focuses on improving system responsiveness and performance, especially on machines with limited memory resources.
    Downloads: 1 This Week
    Last Update:
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  • 12
    Little Registry Cleaner
    Little Registry Cleaner is an open source program designed for Microsoft's Windows Registry. Its purpose is to remove obsolete or unwanted items that build up in the registry over time in order to improve the stability & performance of your computer
    Downloads: 8 This Week
    Last Update:
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  • 13
    Windows Debloater

    Windows Debloater

    Get rid of unnecessary applications that come with Windows!

    Get rid of the unnecessary applications that come with Windows and use the performance tools! Supported Languages: English, Turkish, German, Russian SYSTEM REQUIREMENTS CPU: 1GHZ any CPU. RAM: 512MB or higher. OS: Windows 10 or newer operating system.(64Bit) Connection: 512 KBPS or faster Internet connection.
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    Downloads: 27 This Week
    Last Update:
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  • 14
    WinHubX

    WinHubX

    WinhubX

    Downloads: 21 This Week
    Last Update:
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  • 15
    Razer Cortex

    Razer Cortex

    Automatically streamline your PC’s performance

    Automatically streamline your PC’s performance and visuals for supported games, thanks to an advanced AI with a machine-learning algorithm that calculates the best settings based on your preferences. Take your PC optimization one step further with a one-stop solution that automatically detect and delete junk files to free up space. Get more bang for your buck with a price comparison engine that scans top digital PC game stores to compile the best prices, as you join frequent giveaways for a chance to score new games and Razer gear. Explore our fan-favorite rewards program that lets you earn Razer Silver while gaming on your PC—loyalty points you can use to redeem a variety of exciting rewards such as Razer gear, games, and more.
    Downloads: 5 This Week
    Last Update:
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  • 16
    OptiBoot

    OptiBoot

    Lightweight PC tool for startups, services, and hardware info

    About "A lightweight PC utility that lets you easily manage startup applications, control system services, and view detailed hardware information—all in one place." NOTE: .NET Core 8 must be installed.
    Downloads: 5 This Week
    Last Update:
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  • 17
    CleanerX

    CleanerX

    CleanerX for Gaming, Windows Optimizer

    Open source optimization program for Windows.
    Downloads: 0 This Week
    Last Update:
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  • 18
    Little Registry Optimizer

    Little Registry Optimizer

    Compact the Windows Registry

    Little Registry Optimizer is a part of Little Apps` Little Registry Cleaner. This project is aimed to analyze the windows registry and optimize it so it will be smaller and run smoother. This program is licensed under the GNU General Public License.
    Downloads: 0 This Week
    Last Update:
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  • 19
    Downloads: 0 This Week
    Last Update:
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  • 20
    An open source PC care suite for optimizing and protecting PCs. The goal is to produce a security suite that can optimize computers easily, as well as provide an easy to use firewall, and antivirus.
    Downloads: 0 This Week
    Last Update:
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  • 21
    Sadeaner

    Sadeaner

    Sadeaner is a good tool for cleaning up the PC

    Sadeaner is a powerful and efficient tool for cleaning your PC. It offers a wide range of useful functions, such as the ability to remove unnecessary files and folders, free up valuable disk space, and improve the overall performance of your system. This makes it an excellent choice for gamers, as it can help to free up resources and improve the performance of games. Additionally, Sadeaner will also include advanced features such as a registry cleaner, startup manager, and browser cleaner, which can help to keep your system running smoothly and efficiently.
    Downloads: 0 This Week
    Last Update:
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  • 22

    Sylph Cleaner

    Registry cleaner and uninstaller

    Sylph Syndicate has launched a registry cleaner and uninstaller for terminal. Less processing. Quicker responses.
    Downloads: 0 This Week
    Last Update:
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  • 23
    Little System Cleaner

    Little System Cleaner

    Little System Cleaner is an all in one system cleaner.

    Little System Cleaner is an all in one system cleaner for Windows computers. Little System Cleaner combines several tools created by Little Apps into one, these tools include a registry cleaner, registry optimizer, disk cleaner, privacy cleaner, duplicate finder, startup manager and uninstall manager. These tools allow you to make your Windows PC perform better and faster. * Faster System Speed * Free Up Disk Space * Protect Your Privacy * Remove Programs From Starting With The Computer * Uninstall Unnecessary Software * ... and much more!
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    Downloads: 3 This Week
    Last Update:
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