Apps to Cross-platform

Mozilla Add-ons is the official repository for extensions and themes to customize and enhance the Firefox web browser. It offers a vast and diverse collection to personalize your browsing experience.

Joplin is a free and open-source note-taking and to-do application designed for users who value data ownership, privacy, and flexibility. It offers robust synchronization options, including cloud services like Dropbox, OneDrive, and Nextcloud, as well as WebDAV. With support for Markdown, powerful search capabilities, and cross-platform availability, Joplin is a versatile tool for organizing information and boosting productivity.

Authy provides a secure and user-friendly solution for managing two-factor authentication (2FA), protecting your online accounts beyond just a password.

GIMP (GNU Image Manipulation Program) is a powerful, free, and open-source raster graphics editor used for image manipulation, retouching, composition, and authoring. It supports a vast array of file formats and provides sophisticated tools comparable to commercial alternatives, making it a versatile choice for photographers, designers, and artists.

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

Firebird is a powerful, open-source relational database management system (RDBMS) known for its small footprint, high performance, and low maintenance requirements. It offers support for major ANSI SQL standards, making it a reliable choice for various applications from embedded systems to enterprise solutions.

YouWave is a Windows-based Android emulator designed to run Android applications and games on your PC. It provides a virtual Android environment, enabling users to test apps, play mobile games with keyboard and mouse, and access the Android ecosystem without a physical device.

Sekaiju is a free and open-source MIDI sequencer software designed for creating, editing, and playing back MIDI music. It offers a range of features suitable for composers, producers, and musicians looking for a flexible and customizable environment for MIDI work.

Apache OpenOffice Base is a robust desktop database management system designed to cater to a wide range of database needs, from simple home use to complex business applications, offering a user-friendly interface for creating and managing databases.

Hubii positions itself as a decentralized content marketplace leveraging blockchain technology. It aims to disrupt traditional content distribution by empowering content creators and consumers through a tokenized ecosystem.

MadEdit is a discontinued, cross-platform text and hex editor designed with developers in mind. It offers syntax highlighting, a hex editing mode, and various customization options within a lightweight, tabbed interface. While no longer maintained, it provided a range of features useful for coding and binary file manipulation.

ZombieChat is a revolutionary peer-to-peer messenger application that allows users to connect and communicate directly with each other without relying on traditional internet or cellular networks. It leverages mesh networking and Bluetooth technology to enable seamless chat, file sharing, and even voice messages in offline environments.

Nim is a modern, statically typed, compiled programming language emphasizing efficiency, expressiveness, and flexibility. It draws inspiration from languages like Python, Pascal, and C++, making it approachable for developers while offering low-level control for systems programming.

Filedrop is a remarkably simple and fast peer-to-peer file sharing platform that enables quick and secure transfers between devices without the need for accounts or cloud storage. Leveraging direct connections, it offers a streamlined experience for sharing files large or small, featuring drag-and-drop functionality and real-time collaboration capabilities.

Vifm is a ncurses-based file manager with Vim-like keybindings, designed for efficiency in terminal environments. It offers a dual-pane interface, tab support, and extensive customization options, making it a powerful tool for users comfortable with command-line workflows and seeking a highly keyboard-driven file management experience.

LibGDX is a robust, free, and open-source Java game development framework designed for creating 2D and 3D games across multiple platforms including Windows, macOS, Linux, Android, and web browsers.

Couchbase is an open-source, distributed NoSQL cloud database that provides high-performance, flexibility, and scalability for modern applications, optimized for interactive systems requiring low latency and high throughput.

Hack Chat is a refreshingly simple and open-source chat application designed for immediate, no-nonsense communication. Forget complex sign-ups and cluttered interfaces; Hack Chat gets you talking instantly in various channels.

F# is an open-source, cross-platform, functional-first programming language designed for conciseness and correctness. It integrates seamlessly with the .NET ecosystem, making it ideal for data science, web development, and more.

Kotlin is a modern, statically-typed programming language developed by JetBrains. It runs on the Java Virtual Machine (JVM), Android, and the web (via JavaScript), and can compile to native code. Designed for concise, safe, and interoperable code, Kotlin aims to make programming more enjoyable and productive.

GoAruna is a comprehensive file management and cloud storage solution for Android devices. It combines a powerful local file manager with integrated online file hosting, sharing, and synchronization capabilities. GoAruna aims to provide unlimited storage and seamless file access across various platforms.

FireChat is a revolutionary mobile messaging application that enables communication and group chats using a unique mesh networking technology, allowing users to connect via Bluetooth and Wi-Fi even without an active internet connection.

GameMaker is a beginner-friendly cross-platform 2D game development engine with a visual drag-and-drop interface and a dedicated scripting language.

Zero Install is a decentralized cross-platform software distribution system that eliminates the need for traditional installers. It allows users to run applications directly from their original sources, ensuring reliable updates and minimizing dependencies.

Demonsaw is a secure, open-source platform for decentralized information sharing, focusing on user anonymity and privacy through robust end-to-end encryption and a serverless architecture.

fman is a powerful, dual-pane file manager designed for speed and efficiency across Windows, macOS, and Linux. It offers a clean interface, robust search capabilities, extensive keyboard shortcut support, and a flexible plugin system for enhanced functionality.

RethinkDB is a free and open-source, distributed document database designed for building real-time web applications.

Flowdock is a collaborative team workspace combining group chat, inbox, and integrated tool notifications. It streamlines communication and information flow for agile teams, connecting conversations with project management and code development tools like GitHub, Jira, and Trello.

Google Docs Viewer was a web-based service that allowed users to view various document types directly within their web browser without needing native software. It provided a convenient way to access and read files like PDFs, Microsoft Office documents, and other formats online.

Tcl (Tool Command Language) is a dynamic, high-level scripting language ideal for rapid application development, scripting, and automation, particularly strong in graphical user interfaces.