Free Software
DDEV
DDEV is an open source tool that makes it dead simple to get local PHP development environments up and running within minutes. It's powerful and flexible as a result of its per-project environment configurations, which can be extended, version controlled, and shared. In short, DDEV aims to allow development teams to use Docker in their workflow without the complexities of bespoke configuration.
kodeWeave
kodeWeave is a free and open source, realtime coding playground for Markdown, HTML, CSS and Javascript. It shares many similarities with platforms like JSFiddle and JSBin, while being designed to work specifically offline across multiple devices, including mobile. If you every used JSFiddle, JSbin, Dabblet, Liveweave, CodePen, CSSdeck, CSSdesk, Tinkerbin, d3 playground, Plunker or Pastebin kodeWeave will feel familiar.
Airbnb
Airbnb is an online marketplace and platform booking and renting out travel accommodation. Anyone can host on Airbnb in exchange for a 3% commission fee for every booking. The platform is accessible in 62 languages and available across 220+ countries across the globe.
Bevy Engine
Bevy is a refreshingly simple data-driven game engine built in Rust. In Bevy, all engine and game logic uses Bevy ECS, a custom Entity Component System, the fastest ECS according to some benchmarks. With Bevy you can create and render 2D using sprite sheets, dynamic texture atlases, cameras, textures, and materials and extend the capability of the engine with custom shaders, materials, and render pipelines. It also allows you to create 3D games with a modern and flexible 3D renderer with lights, cameras, meshes, textures, materials, gltf loading custom shaders, materials, and render pipelines. The game engine is developed and released as open source software under the MIT License.
Turbolinks
Turbolinks is a JavaScript library that intercepts all clicks on <a href> links to the same domain. When you click an eligible link, Turbolinks prevents the browser from following it. Instead, Turbolinks changes the browser's URL using the History API, requests the new page using XMLHttpRequest, and then renders the HTML response. Allowing you to create dynamic page loading without utilizing SPA architecture.
Akira UX
Akira UX is a free an open-source graphic design software built with Vala and GTK. The application offers a fast approach to UI and UX Design, mainly targeting web designers and graphic designers. Akira UX is available for all major Linux distributions, and through the elementary OS AppCenter.
Unity
Unity is a cross-platform game engine and development platform created by Unity Technologies. With Unity game developers can build high-quality 3D and 2D games, deploy them across mobile, desktop, consoles, VR/AR or the Web. Unity was first released as OS X-exclusive game engine but as of 2018 the engine had been extended to support more than 25 platforms.
Pencil2D
Pencil2D is a simple, yet powerful 2D animation, drawing and painting application that lets you create traditional hand-drawn animation using both bitmap and vector graphics. Pencil2D is released as free and open-source software under the GNU General Public License and uses the Qt framework. With Pencil2D you can seamlessly switch between raster and vector workflows, allowing you to sketch, ink & paint on the go.
RabbitMQ
With RabbitMQ your applications gets a common platform to send and receive messages, and your messages a safe place to live until received. Allowing your application to handle long-running or blocking tasks, and respond quickly to requests instead of being forced to perform computationally intensive tasks on the spot. The software is developed and released as open-source and is currently the most widley used free and open-source message-broker. Commercial, enterprise releases of RabbitMQ is also avalible for a subscription fee.