Apps to Cross-platform

Olive Video Editor is a powerful, open-source, non-linear video editor designed for professionals and enthusiasts alike. It offers a robust set of tools for cutting, merging, color grading, and applying effects, all within a intuitive interface. Being cross-platform and ad-free makes it a compelling alternative to commercial software.

Strawberry is a free and open-source audio player and music collection organizer designed for audiophiles and music enthusiasts. It focuses on delivering high-fidelity audio playback and robust library management.

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.

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.

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.

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.

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.

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.

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.

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

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.

JOE (Joe's Own Editor) is a venerable, full-featured terminal-based text editor known for its ease of use and extensive feature set, making it suitable for both casual editing and complex programming tasks within the command line environment.

ghostwriter is a clean, distraction-free Markdown editor designed for Windows and Linux, emphasizing a focused writing experience. It offers a minimalist interface, live preview of your Markdown rendering, and essential writing tools for individuals who prioritize a clear and uncluttered workspace.

wxMEdit is a versatile cross-platform text and hex editor, serving as a powerful alternative to the discontinued MadEdit. Built on C++ and wxWidgets, it provides developers and advanced users with robust features for editing text files and binary data.

Jython is a Python implementation designed to run on the Java Virtual Machine (JVM). It allows Python developers to leverage Java libraries and frameworks, and Java developers to integrate Python scripting into their applications, bridging the gap between the two ecosystems.

Babun is a Windows shell with a focus on developers, providing a Unix-like command-line environment powered by Cygwin. It offers a wealth of pre-configured tools and features for seamless development workflows on Windows.

OpenFrameworks is a free and open-source C++ toolkit crafted for creative coding. It provides a powerful yet accessible environment for developing cross-platform applications focused on graphics, audio, and real-time interaction, making it ideal for artists, designers, educators, and researchers.

JRuby is a robust implementation of the Ruby programming language built on the Java Virtual Machine (JVM). It provides seamless interoperability between Ruby and Java, allowing developers to leverage the strengths of both ecosystems.

Cocos2d-x is a renowned open-source, cross-platform 2D game engine. Favored by mobile game developers for its efficiency and ease of use, it provides a robust framework for creating engaging 2D games with excellent performance across multiple devices and operating systems. Its flexibility and extensive feature set cater to both beginners and experienced developers.

FreeBASIC is a free and open-source multiplatform BASIC compiler. It supports a wide range of operating systems including Windows, Linux, and macOS (via third-party ports), facilitating cross-platform development. It's designed to be highly compatible with QuickBASIC while offering numerous modern features like object-oriented programming, manual memory management, and support for graphics and sound libraries, making it suitable for various programming tasks from system utilities to game development.

Ionic Framework is an open-source UI toolkit for building high-quality, cross-platform mobile, desktop, and web applications from a single codebase. leveraging web technologies.