ActivityWatch is a free, open-source app that automatically tracks how you spend time on your devices. It’s privacy-first, cross-platform, and a great alternative to RescueTime, ManicTime, or WakaTime. Key features:

📊 Tracks app usage, websites, and overall activity automatically

🔒 Privacy-focused: all data stored locally, no external servers

💻 Cross-platform support: Windows, macOS, Linux, Android

⚙️ Highly extensible with modules and custom watchers

📈 Insightful stats and visualizations to improve productivity or spot bad screen habits

🌍 Community-driven, transparent, and free forever

Perfect for anyone who wants clear insights into their digital habits without sacrificing privacy.

A simple, fast and free app to remove unnecessary files from your computer.

Features

• Written in memory-safe Rust - almost 100% unsafe code free
• Amazingly fast - due to using more or less advanced algorithms and multithreading
• Free, Open Source without ads
• Cache support - second and further scans should be much faster than the first one
• CLI frontend - for easy automation
• GUI frontend
• No spying - Czkawka does not have access to the Internet, nor does it collect any user information or statistics
• Multilingual - support multiple languages like Polish, English or Italian

Multiple tools to use:

• Duplicates - Finds duplicates based on file name, size or hash
  Empty Folders - Finds empty folders with the help of an advanced algorithm
• Big Files - Finds the provided number of the biggest files in given location
• Empty Files - Looks for empty files across the drive
• Temporary Files - Finds temporary files
• Similar Images - Finds images which are not exactly the same (different resolution, watermarks)
• Similar Videos - Looks for visually similar videos
• Same Music - Searches for similar music by tags or by reading content and comparing it
• Invalid Symbolic Links - Shows symbolic links which point to non-existent files/directories
• Broken Files - Finds files that are invalid or corrupted
• Bad Extensions - Lists files whose content not match with their extension

Perfect for anyone who wants a lightweight, reliable, and transparent way to declutter their system.

dupeGuru is a free, open-source tool to find duplicate files on your computer. It can scan filenames or file contents, making it versatile for cleaning up clutter. Key features:

🔍 Filename scan with fuzzy matching to catch duplicates even when names differ slightly

🎵 Music mode: scans tags and shows music-specific info in results

🖼️ Picture mode: fuzzy image scanning to detect similar photos

⚙️ Customizable matching engine to fine-tune duplicate detection

🛡️ Safe design: grouping system prevents accidental deletion of important files

💻 Cross-platform support: Windows, macOS, Linux

Perfect for anyone who wants a reliable way to declutter storage and organize files without risk.

Technitium DNS Server is a free, open-source authoritative and recursive DNS server that can be self-hosted for maximum privacy and control. It works out-of-the-box with minimal configuration and provides a user-friendly web console. Key features:

🔒 Supports encrypted DNS protocols: DNS-over-TLS, DNS-over-HTTPS, DNS-over-QUIC

⚡ Performance boost: local caching makes websites load faster

🛡️ Network-wide control: block domains, route DNS traffic securely

📊 DNS logs and stats for deeper insights into your network

💻 Cross-platform: Windows, Linux, macOS, Raspberry Pi

🌍 Ideal for home networks or organizations seeking independence from ISP or third-party DNS providers

Perfect for anyone who wants privacy, security, and control over DNS resolution without relying on external services.

HomeBank is a free, open-source personal finance software designed for everyone. It helps you manage your money, track expenses, and analyze your financial habits with ease. Key features:

📊 Detailed charts and statistics to visualize spending and income

💳 Import data from popular formats (OFX, QIF, CSV) for easy migration

🔔 Budget management with customizable categories and alerts

💻 Cross-platform support: Windows, Linux, macOS, FreeBSD

🌍 Multilingual interface with active community contributions

🛡️ Free forever, no subscriptions or hidden costs

Perfect for anyone who wants clear, reliable, and user-friendly money management without sacrificing privacy or paying for premium tools.

Kdenlive is a powerful, free, open-source non-linear video editor built on the MLT framework. It integrates a wide range of plugins and effects for video and audio processing, making it a complete studio for video creation. Key features:

🎞️ Multi-track editing with a customizable timeline

✨ Wide range of video/audio effects and transitions

🖋️ Advanced titling tool for text and graphics

📀 DVD authoring with menus for distribution

⚙️ Proxy editing for smoother performance on lower-end hardware

🌍 Cross-platform support: Linux, Windows, macOS

🛡️ Free Software under GNU GPL — no subscriptions, no locked features

Perfect for creators who want professional-grade editing freedom without the cost.

OpenShot Video Editor is an easy-to-use, quick-to-learn, and surprisingly powerful video editing tool. Designed for accessibility and creativity, it’s perfect for beginners and pros alike. Key features:

💻 Cross-platform support: Linux, macOS, Windows

✂️ Video trimming: easily cut and trim clips

🎞️ Animation & keyframes: add dynamic motion to your projects

🖼️ Layer support: multiple layers for watermarks, background videos, audio tracks, and more

🎨 Video effects: remove backgrounds, adjust brightness, invert colors, and more

🔊 Audio visualization: display audio as waveforms

📝 Title templates: use built-in templates or create custom titles

🎮 Playback control: reverse, slow down, speed up, and animate playback speed

📂 Drag-and-drop import for video, audio, and images

Perfect for anyone who wants powerful yet approachable video editing freedom without the cost.

Betterbird is a fine‑tuned version of Mozilla Thunderbird, designed to deliver a smoother, more feature‑rich email experience.

🔧 Exclusive new features not yet in Thunderbird

🐞 Bug fixes unique to Betterbird

⚡ Performance and usability improvements

🖥️ Cross‑platform support (Windows & Linux)

🌐 Open‑source, community‑driven project

Perfect for: Users who love Thunderbird but want faster updates, extra features, and fewer bugs.

Okular is a powerful, multi‑platform document viewer that goes beyond PDFs. It supports comics, ePub books, images, Markdown, and more — all in one sleek interface.

📖 Read PDFs, comics, and ePub books

🖼️ Browse images and visualize Markdown documents

📝 Annotate your PDFs with ease

✍️ First‑class signature support

💻 Fast, feature‑packed, and cross‑platform (Windows & Linux)

Perfect for: Users who want a versatile, free, and open‑source document viewer that handles almost any format.

LocalSend is a free, open‑source, cross‑platform tool that lets you share files instantly with nearby devices — no internet required.

📡 Send files directly over local network

🔒 Secure, private, and open‑source

💻 Works across Windows, macOS, Linux, Android, and iOS

⚡ Fast transfers without cloud dependency

Perfect for: Users who want a simple, private, and cross‑platform way to share files without third‑party servers.

ExifCleaner is a free, open‑source tool that removes hidden metadata (like GPS coordinates, device info, and camera settings) from your images. This protects your privacy and reduces file size.

🗺️ Strip GPS location data from photos

📷 Remove device and camera details

⚡ Reduce image file size instantly

💻 Works across Windows, Linux, and macOS

🔒 Keep your digital footprint private

Perfect for: Users who want to share images online without leaking personal or device information.

Calibre is a powerful and easy‑to‑use e‑book manager that goes beyond normal e‑book software. It’s completely free and open source, making it a must‑have for both casual readers and power users.

⏱️ Save time on managing your e‑book collection

🌍 Use it everywhere and with anything

📖 Comprehensive e‑book viewer

📰 Download news and magazines from the web

📤 Share and back up your library easily

✏️ Edit the books in your collection

🛠️ Satisfy every e‑book need with community support

Perfect for: Readers and professionals who want a versatile, free, and open‑source solution for managing their digital libraries.

GnuCash is a free, open‑source financial accounting software designed for personal and small‑business use. It combines ease of use with professional accounting principles to ensure balanced books and accurate reports.

📊 Track bank accounts, income, and expenses

💹 Manage stocks, investments, and portfolios

🧾 Double‑entry accounting for accuracy

💻 Cross‑platform support (Windows, macOS, Linux, BSD, Solaris)

🔒 Licensed under GNU GPL, community‑driven

Perfect for: Individuals and small businesses who want reliable, professional‑grade accounting software without the cost.

Jami is a free/libre, end‑to‑end encrypted, and private communication software. It offers peer‑to‑peer connectivity without central servers, ensuring privacy and freedom for its users.

⚡ Fast latency with direct peer‑to‑peer connections

🌐 Works even without internet on local networks

🛡️ End‑to‑end encrypted communications

🙅 No personal information required to create an account

📞 Unlimited: no restrictions on file size, bandwidth, or features

🚫 Ad‑free: there will never be advertising on Jami

Perfect for: Users who want secure, private, and unrestricted communication across multiple platforms.

Quiet is a free, open‑source messaging app that eliminates the need for central servers. Messages sync directly between devices over Tor, giving you full control of your data and communications.

💬 Peer‑to‑peer messaging without servers

🛡️ Built‑in privacy with onion routing

🌐 Cross‑platform support (Windows, macOS, Linux, Android)

⚡ Lightweight and community‑driven project

🚫 No reliance on Big Tech infrastructure

Perfect for: Users who want secure, private group or organizational messaging without depending on third‑party servers.

Krita is a free, open‑source professional painting program made by artists for artists. It offers a full set of creative tools for illustration, concept art, texture and matte painting, and comics.

🖌️ Powerful brush engines with extensive customization

🎨 Advanced layer management and blending modes

📚 Built‑in resource manager for brushes and textures

⚡ Optimized for performance with large canvases

🌐 Cross‑platform support (Windows, macOS, Linux)

🤝 Community‑driven project with active development

Perfect for: Artists, illustrators, and designers who want a professional‑grade, open‑source alternative to commercial painting software.

Obsidian is a powerful note‑taking and knowledge management app that adapts to the way you think. It uses Markdown files stored locally, giving you full control over your data while offering extensive customization through plugins and themes.

📂 Local‑first: your notes are plain Markdown files

🔒 Privacy‑friendly, no forced cloud dependency

🧩 Hundreds of plugins and themes for customization

⚡ Fast, flexible, and extensible knowledge base

🌐 Cross‑platform support (Windows, macOS, Linux, Android, iOS)

🤝 Free for personal use, with optional paid sync and publishing features

Perfect for: Writers, researchers, and thinkers who want a private, customizable, and extensible knowledge management system.

HandBrake is a free, open‑source tool built by volunteers for converting video from nearly any format to a selection of modern, widely supported codecs.

📼 Convert videos from almost any format

🎞️ Output to MP4, MKV, WebM, and more

⚡ Presets for fast, easy conversion or fine‑tuned custom settings

🎚️ Advanced options: filters, cropping, scaling, and bitrate control

🌐 Cross‑platform support (Windows, macOS, Linux)

🤝 Community‑driven project with active development

Perfect for: Users who want a reliable, flexible, and open‑source solution for video conversion and compression.

AES Crypt is a free, open‑source file encryption software that uses the industry‑standard Advanced Encryption Standard (AES) to protect sensitive files. Designed for simplicity, it makes strong encryption accessible to everyone.

🛡️ 256‑bit AES encryption for maximum security

⚡ Easy‑to‑use interface, no cryptography expertise required

💻 Cross‑platform support (Windows, macOS, Linux)

📂 Encrypt individual files quickly and reliably

🌐 Perfect for securing files stored locally or in the cloud

🤝 Widely trusted with millions of downloads

Perfect for: Users who want a straightforward, reliable way to protect sensitive files without complexity.

MoneyManager Ex is a free, open‑source, cross‑platform software that helps you organize your finances and keep track of where, when, and to whom the money goes. It provides a clear overview of your financial worth and supports multiple accounts.

📊 Track income, expenses, and account balances

⚡ Manage multiple accounts with ease (bank, cash, credit, investments)

📝 Budgeting tools with categories and recurring transactions

🌐 Cross‑platform support (Windows, macOS, Linux, Android)

📂 Import/export data in common formats (CSV, QIF, etc.)

🤝 Community‑driven with active development and support

Perfect for: Individuals and families who want a simple, privacy‑friendly alternative to proprietary finance management tools.