Open-source alternatives to Lemon Cleaner

BleachBit is a system cleaning tool that frees disk space by removing accumulated cache, cookies, logs, temporary files, and other unnecessary data. It provides a preview of what will be deleted before any permanent changes are made, allowing safe review and adjustment of cleaning operations. The tool offers extensive control over what gets cleaned, including the ability to exclude specific files and folders, create custom cleaning rules for files not covered by built-in cleaners, and import over 2,400 community-maintained cleaning rules from winapp2.ini files. It supports secure data erasure

eul is a native macOS system monitor and desktop application built with SwiftUI. It serves as a status bar utility for tracking real-time CPU, memory, network, and battery usage. The application includes a dedicated Bluetooth device battery tracker to monitor the charge levels of connected peripherals. It is developed as a multilingual utility with a localized user interface to support multiple languages. The software covers system resource monitoring and peripheral battery tracking, integrating these metrics directly into the macOS menu bar.

htop is a terminal-based system resource monitor and interactive process viewer. It functions as a text-user interface dashboard for overseeing hardware temperatures, load averages, and battery status while providing a comprehensive tool for monitoring and managing system processes. The application distinguishes itself through detailed process lifecycle management, allowing users to kill processes, adjust priorities via renicing, and assign CPU affinity to specific cores. It provides high-level visibility into system behavior through process hierarchy visualization and the ability to inspect

Bashtop is a terminal-based system monitor and resource dashboard for Unix systems, including Linux, macOS, and FreeBSD. It provides a text-user interface for tracking real-time hardware performance and managing system processes. The tool functions as a hardware dashboard that visualizes processor, memory, disk, and network usage. It includes process management capabilities that allow users to filter, sort, and terminate active system tasks directly from the command line. Users can customize the visual appearance and behavior of the monitor through integrated menus or local configuration fil

mac-cleanup-sh is a command-line utility designed for macOS that automates the removal of temporary files, system logs, and application caches. It functions as a system maintenance tool to reclaim storage capacity by identifying and purging redundant data across the operating system and development environments. The tool distinguishes itself by providing a dry-run simulation mode that calculates potential disk space recovery before any files are deleted. It utilizes pattern matching to target specific directories and handles cleanup operations idempotently, ensuring that the process continues

Linux-dash is a self-hosted system monitoring dashboard and web interface designed to track real-time hardware and software performance metrics on Linux servers. It functions as a lightweight remote monitoring panel that displays the operational state of a Linux environment via a web browser. The project is a runtime-agnostic monitoring tool, meaning it is capable of running across multiple different language stacks to match various server environments. The tool provides capabilities for system administration and observability, allowing for the remote management of Linux systems and the coll

Mac-CLI is a collection of terminal commands and utilities designed for automating system management, hardware monitoring, and software configuration on macOS. It serves as a developer utility and automation tool for manipulating files, managing version control, and auditing installed packages from the command line. The project provides hardware monitoring capabilities to track real-time battery health, CPU temperature, and fan speeds. It also includes system automation tools for managing power states, disk usage, and network settings through a unified interface. The utility covers several f

Tracy is a real-time performance profiling framework for C and C++ applications. It provides a software instrumentation library that captures high-resolution telemetry data, which is then visualized through a separate graphical interface to identify bottlenecks and resource allocation issues. The system utilizes a client-server architecture that enables remote profiling, allowing performance data to be captured on a target machine and analyzed on a workstation. It employs lock-free event logging and shared-memory ring buffers to minimize the overhead of data collection, ensuring that the main

ZyperWinOptimize is a Windows system optimization tool that automates performance tuning by removing bloatware, disabling unnecessary services, and cleaning junk files to improve system responsiveness. It functions as a profile-driven configuration tool, storing user-selected optimization settings in a JSON file for consistent reapplication across sessions, and includes capabilities for Windows and Office activation via embedded product keys and command-line tools. The tool distinguishes itself through its comprehensive approach to system modification, combining registry tweaking, service sta

Device activity tracker is a network activity monitor and probe analyzer that identifies device connectivity states by measuring the round-trip times of network probe requests. It functions as a latency-based state detector, utilizing specific message requests to trigger responses and determine if a target device is active, in standby, or offline. The project distinguishes itself through the analysis of messaging platform delivery receipts to detect user engagement. It employs dynamic median thresholding to adapt state detection to varying network conditions by comparing current response time

Organize is a command-line utility designed to automate file system management, storage cleanup, and directory organization. It functions as a rule-based engine that processes files through sequential pipelines, allowing users to define complex workflows for moving, renaming, and managing local data. The system utilizes structured configuration files to map file system triggers to specific actions. It distinguishes itself through a simulation engine that allows users to preview the impact of their rules on a virtual file system before applying changes, ensuring data integrity. Additionally, t

This project is a web-based management interface designed for the administration, monitoring, and configuration of Nginx server instances. It functions as a centralized platform for managing reverse proxy settings, traffic routing, and server lifecycles, providing a visual dashboard to replace manual configuration file editing. The platform distinguishes itself through integrated infrastructure automation and observability tools. It supports distributed environments by synchronizing configuration states across multiple nodes and containerized services, while offering artificial intelligence a

Czkawka is a cross-platform utility designed for storage optimization and filesystem maintenance. It functions as a comprehensive file analysis engine that identifies redundant data, including duplicate files, empty directories, broken symbolic links, and temporary files. By utilizing hash-based content verification, the tool ensures accurate identification of duplicates regardless of file names or metadata. The project distinguishes itself by offering both a native graphical user interface and a command-line interface, allowing for both interactive management and automated, headless system m

WindowsCleaner is a set of administrative utilities for optimizing Windows storage through automated cleanup, file relocation, and system resource management. It functions as a disk cleanup tool and storage manager designed to reclaim space on Windows installations by removing temporary files and system junk. The tool provides specific capabilities to disable system hibernation to recover reserved disk space and migrate virtual memory paging files to different drives to free up storage on primary partitions. These operations are supported by system maintenance features that handle registry-b

This project provides a containerized DNS sinkhole and network-wide traffic filtering solution. It functions as a central network resolver that intercepts domain queries, allowing users to block advertisements, trackers, and malicious domains by returning null responses to connected devices. The platform distinguishes itself through its integrated DHCP server and comprehensive management capabilities, which allow for automated IP address allocation and granular control over network traffic. It supports complex filtering through regular expression matching, hierarchical rule prioritization, an

WhatCable is a macOS system utility for hardware monitoring and USB-C cable diagnostics. It functions as a marker chip reader, data link inspector, and power delivery analyzer to identify the technical specifications and hardware capabilities of connected cables. The tool extracts vendor IDs and specification flags from internal e-marker chips to verify cable authenticity and identify data transfer speeds and current ratings. It distinguishes itself by providing Thunderbolt topology inspection to visualize high-speed links and comparing active display modes against link capacity to diagnose r

Gotop is a terminal-based system monitor and resource dashboard built with the Go programming language. It serves as a text-based user interface for real-time tracking of hardware resources, network activity, and running processes. The application provides a performance dashboard featuring graphical widgets for CPU and memory metrics. It includes a process manager that allows users to list, sort, and terminate active system processes based on their resource consumption. The interface supports customization through theme styling and layout configurations, enabling users to adjust color scheme

dua-cli is a cross-platform terminal-based disk usage analyzer and cleanup utility. It scans directories in parallel using thread pools to compute and display disk space consumption faster than sequential traversal, then lets users navigate the results interactively and delete unwanted files with safety measures. The tool distinguishes itself through a multi-step deletion confirmation process that requires user approval before permanently removing files, with an optional trash integration that moves deleted items to the system trash instead of performing irreversible removal. It reads setting

Dust is a command line disk usage analyzer written in Rust. It functions as a disk space visualization tool and recursive directory size scanner used to identify large files and directories through a formatted list of disk consumption across a filesystem. The tool differentiates itself by providing a recursive tree view to visualize space distribution and the ability to output directory and file size data in machine-readable formats for external processing and analysis. Its broader capabilities include filesystem auditing and storage capacity management. This is achieved through file and dir

Pearcleaner is a system maintenance utility designed to reclaim disk space on macOS by identifying and removing residual files left behind after software uninstallation. It functions as an application uninstaller and storage management tool, ensuring that configuration files, caches, and support data are purged to maintain a clean system state. The application distinguishes itself through event-driven automation, utilizing kernel-level monitoring to detect when files are moved to the trash and triggering immediate scans for orphaned data. It integrates directly into the desktop environment vi

LibreHardwareMonitor is a .NET library and system health monitoring tool for Windows. It provides a programmatic hardware sensor API and a low-level interface to access real-time temperature, voltage, and fan speed data from computer hardware components. The project serves as a bridge between Windows operating system calls and physical sensors, allowing for the monitoring of processors, graphics cards, motherboards, storage devices, and network adapters. This enables the tracking of system stability and the collection of environmental changes across various hardware components. The software

This library provides a cross-platform toolkit for retrieving system metrics and managing processes. It functions as a unified interface for accessing low-level hardware and operating system data, allowing developers to monitor CPU, memory, disk, and network usage across diverse computing architectures without requiring external dependencies. The project distinguishes itself through its ability to maintain consistent data structures across different operating systems by parsing native system headers and wrapping low-level system calls. It includes specialized support for containerized environ

Universal Android Debloater is a desktop utility designed to manage and remove pre-installed software from Android devices. By utilizing the Android Debug Bridge, the tool allows users to identify and disable or uninstall system applications on non-rooted devices to improve privacy, storage availability, and overall system performance. The software distinguishes itself through its ability to reconcile current device states against declarative configuration files, enabling the automated application of software removal profiles. It supports multi-instance management, allowing users to connect t

Dashy is a configuration-driven dashboard designed for personal infrastructure management and self-hosted service monitoring. It functions as a centralized portal that aggregates web links, live infrastructure metrics, and application health status into a unified, searchable interface. By utilizing a structured schema, the platform allows users to define their entire layout, navigation, and widget configuration through version-controlled files, ensuring a portable and reproducible setup across different environments. The project distinguishes itself through a highly modular architecture that

Btop is a terminal-based system monitor that tracks and displays real-time hardware performance metrics. It functions as a resource usage dashboard, providing visibility into processor, memory, disk, network, and active process activity directly within a text-based interface. The application utilizes ANSI escape sequences to render complex graphical interfaces and data visualizations within standard terminal emulators. It is designed as a cross-platform performance tool, maintaining consistent monitoring capabilities across various Unix-like operating systems through a platform-agnostic build

Locust is a distributed performance testing framework that allows users to define complex system stress scenarios using standard Python code. By modeling concurrent users as classes with weighted tasks and lifecycle hooks, it enables the simulation of realistic user behavior across large-scale environments. The tool functions as a scalable load generator capable of orchestrating traffic across multiple worker nodes to measure system stability and responsiveness under heavy, real-world conditions. The framework is distinguished by its protocol-agnostic architecture, which supports diverse comm

This library provides a programmatic interface for monitoring system resources and managing process lifecycles. It functions as a cross-platform utility that retrieves real-time metrics on hardware utilization and allows for the inspection and control of running system processes. The project normalizes disparate operating system data structures into a unified interface, enabling consistent interaction with kernel-level information regardless of the host environment. By utilizing compiled extensions to interface directly with native system APIs, it provides a consistent way to access performan