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

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  • 1
    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: 311 This Week
    Last Update:
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  • 2
    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: 240 This Week
    Last Update:
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  • 3
    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: 75 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: 26 This Week
    Last Update:
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  • 5
    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: 18 This Week
    Last Update:
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  • 6
    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: 51 This Week
    Last Update:
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  • 7
    WinHubX

    WinHubX

    WinhubX

    Downloads: 17 This Week
    Last Update:
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  • 8
    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: 5 This Week
    Last Update:
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  • 9
    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: 2 This Week
    Last Update:
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  • 10

    trimboot

    TrimBoot maps & controls Windows startup items and right-click menus.

    TrimBoot is a Windows desktop tool that maps autostart surfaces—Run keys, services, drivers, scheduled tasks, WMI, and related hooks—in one sortable view. It helps you see what launches at boot, spot new or changed entries, and review signing signals when paths point to files. Sensitive system items are flagged to reduce risky mistakes; where appropriate you can disable or remove entries using patterns designed for safer rollback. Monitoring highlights drift over time. Blacklist-style rules can match paths, hashes, or publishers for repeatable cleanup. A dedicated Explorer context-menu view reduces menu clutter without manual registry spelunking. Some changes need administrator rights; prefer disable over delete when unsure. TrimBoot improves visibility and control; it complements—but does not replace—antivirus and normal backups.
    Downloads: 2 This Week
    Last Update:
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  • 11
    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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  • 12
    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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  • 13
    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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