Apps to Works Offline

ActivityWatch is a free and open-source, privacy-focused time-tracking application that automatically monitors how you spend time on your devices, offering detailed insights into your digital activities with local storage and offline functionality.

Abricotine is a user-friendly markdown editor designed for distraction-free writing with an intuitive inline preview.

RedReader is a highly-regarded open-source Reddit client for Android, prioritizing a fast, efficient, and ad-free browsing experience. It offers extensive customization options, offline capabilities, and a focus on user privacy.

Elephant is a portable, privacy-focused note-taking application featuring a classic, intuitive interface. It supports robust note organization, rich text formatting, markdown, and offline access. With capabilities like image insertion and secure cloud synchronization, Elephant is designed for users needing a reliable and versatile digital notebook.

Markdown Edit is a robust Markdown editor exclusively for Windows, crafted for serious writers and developers who prioritize efficiency and keyboard-centric workflows. It emphasizes a clean interface and powerful feature set, moving beyond simple text areas to offer a true editing experience tailored for Markdown.

Inkpad is a lightweight vector graphics editor designed for simplicity and portability. It focuses on core drawing functionalities, layer support, and direct SVG output, making it an ideal choice for quick vector tasks, UI design mockups, and simple illustrations directly on your desktop.

Timeline is a powerful, cross-platform application designed for creating, visualizing, and navigating historical or fictional events on an interactive timeline. It's ideal for researchers, writers, educators, and anyone needing to organize complex sequences of events.

Twister is a peer-to-peer microblogging platform designed for uncensored communication. It operates on a decentralized network, ensuring free speech and privacy without central servers or third-party tracking.

ThinkComposer is a highly flexible visual modeling tool designed for users to create rich, structured diagrams based on their specific domain knowledge. It facilitates the organization and visualization of complex information through various diagram types and hierarchical structures, enabling deep understanding and effective communication of ideas.

UberWriter is a discontinued open-source minimalist text editor designed for distraction-free writing with integrated Markdown support, syntax highlighting, and a focus on simplicity. It provides a clean environment for authors and writers.

Gruik is a powerful, free, and open-source note-taking service designed for users who value privacy, organization, and control over their data. Offering robust features like hierarchical organization, offline access, rich text formatting, and synchronization options, it provides a flexible platform for managing notes, ideas, and personal knowledge wikis.

qvPDF is a versatile PDF creator for Windows, operating as a virtual printer driver. Its modular plugin architecture allows users to perform various actions after creating a PDF, such as merging, splitting, encrypting, and converting files.

MyTetra is a versatile, cross-platform information manager designed for collecting, organizing, and managing various types of data. It excels as a portable note-taking application, personal information manager, and notebook, offering a robust outliner and rich text editing capabilities.

MarkPad is a robust and user-friendly markdown editor designed for writers, developers, and anyone who needs to structure and publish text efficiently. It offers a clean interface, real-time preview, and a range of features for enhanced productivity and content creation.

Open365 is a comprehensive, open-source productivity suite offering cloud storage, office applications, and communication tools. Built upon a foundation of open-source technologies like KDE, Seafile, and LibreOffice, it provides a robust alternative to proprietary solutions, emphasizing privacy and control.

Omni Notes is a versatile open-source note-taking application for Android. It emphasizes simplicity, lightweight design, and offline functionality while providing robust features for organizing and managing your notes effectively.

Keepass2Android is a feature-rich, open-source password manager for Android devices. It provides secure storage and management of your credentials through compatibility with the widely used KeePass database format, offering robust encryption and various synchronization options.

StackEdit is a powerful in-browser Markdown editor with seamless cloud synchronization and publishing capabilities. It's designed for writers, developers, and anyone who needs a distraction-free environment to create and manage rich text content using Markdown.

AES Crypt is a robust and easy-to-use file encryption utility that safeguards your sensitive data using the highly secure AES standard. Available for both Windows and Linux, it offers seamless integration with the operating system shell for fast and efficient encryption and decryption.

Cryptomator offers transparent client-side encryption for cloud storage. It creates virtual encrypted drives, allowing you to protect your sensitive files on platforms like Dropbox, Google Drive, and OneDrive without sacrificing convenience or syncing capabilities. Your data remains confidential, even if the cloud provider is compromised.

Org-mode is a powerful and flexible mode for GNU Emacs, designed for note-taking, project planning, to-do list management, and authoring documents. It utilizes simple plain text files with intuitive markup.

Sozi is an open-source, browser-based presentation tool that utilizes SVG for creating non-linear, zooming presentations. Unlike traditional slide-based software, Sozi allows presenters to navigate freely across a single SVG canvas, focusing on different areas with dynamic transitions.

Calligra Suite is a comprehensive graphic art and office suite developed by KDE. It provides a rich set of applications for word processing, spreadsheets, presentations, vector drawing, and database management, catering to a wide range of productivity and creative needs.

AntennaPod is a free and open-source podcast player for Android, designed for listeners who value control, privacy, and a clean experience. It offers a robust set of features for discovering, downloading, and managing your podcast library.

RedNotebook is a free and open-source desktop journal and diary application offering a clean interface and features for organizing notes, thoughts, and ideas with a calendar view, tag search, and basic text formatting.

GNU Privacy Guard (GnuPG or GPG) is a free and open-source implementation of the OpenPGP standard, widely used for encrypting and signing data and communications. It provides a robust suite of command-line and graphical tools to protect sensitive information.

Sky Map is a user-friendly Android planetarium app that turns your device into a window to the universe. Simply point your phone at the sky to identify stars, constellations, planets, and more. It's an excellent tool for both casual stargazers and budding astronomers.

wikidPad is a free and open-source wiki-like notebook application that allows you to store your thoughts, notes, and snippets of information in a highly organized and cross-referenced manner. Its strength lies in the effortless creation of links between pages, making it easy to navigate and connect related ideas.

Leanote is a versatile self-hosted note-taking application that blends rich text editing with Markdown support. It offers seamless synchronization across multiple devices and features built-in blog publishing capabilities, making it a powerful tool for both personal information management and content creation.

Tomboy is a free and open-source desktop note-taking application designed for simplicity and efficiency across Linux, Unix, Windows, and macOS. It utilizes a wiki-like interface for easy linking between notes and offers features like automatic linking, full-text search, and local storage, making it an accessible and reliable tool for organizing your thoughts and tasks.