Free Development & DevOps Software
Haskell
Haskell is a free and open-source purely-functional programming language. The language has been around since the 1990's and has pioneered a number of advanced programming language features such as type classes, which enable type-safe operator overloading. Haskell is an open-source project of more than twenty years of scientific research and provides built-in concurrency and parallelism, debuggers, profilers and rich libraries that can be used to build robust applications while following functional programming patterns.
Unreal Engine
The Unreal Engine is a game engine and suite of tools and technologies developed by Epic Games. The engine was first released in 1998 as a part of the first-person shooter game Unreal, where the game itself was built on the engine. Today the Unreal Engine has grown into an ecosystem that includes a marketplace for game assets that can help indie developer to develop games and make a living selling game assets them selves. The Unreal Engine is free to use and provides a revenue-share model for developers and has been used to tipple A studios and indie developers to create games in almost every genre, including platformers, fighting games,RPGs, MMORPGs, and many more.
Padrino
Padrino is a Ruby web framework built upon the library Sinatra. Sinatra is a DSL designed to create simple and performant applications written in Ruby. Padrino is uses Sinatra at its core and builds upon it to create a framework take makes it even easier and faster to create advanced web applications with Ruby. Padrino is designed to be agnostic and provides full support for many popular testing, templating, mocking, and data storage choices. It also provides generators that makes it easy to create, models, controllers and application scaffolding. On top of that Padrino provides functionality found in most frameworks including solutions for assets, forms, mail, caching, administration and logging.
MoinMoin
MoinMoin is a free and open-source, Python-based WikiEngine thate features an extensible core. With MoinMoin you can create self-hosted wikies and informational resource sites. MoinMoin's extensible core allow for plugins to be installed to further extend the capability of the software. Allowing you to install auth plugins for custom authentication, filter plugins for indexing file attachments of different mimetypes, parsers for new input formats formatters to produce different output formats than HTML, themes xmlrpc and CMS solutions.
React
React is a free an open-source Javascript framework for frontend development. With React you can build powerful, component-based application that supports compilation of JSX, ES6 and auto-prefixed CSS files. The popular framework is developed by Facebook and used by countless of applications across the web and mobile devices to build structured user interfaces or UI components.
HubPress
HubPress is a free and open-source static site generator written in JavaScript, powered by Vue.js, Asciidoctor and GitHub. All you need to create a static site with HubPress is a free GitHub account, no servers or subscriotion fees. To setup HubPress you simply fork the hubpress.io repository, update the config file and you are ready to start your blog. HubPress uses the free hosting provided by GitHub Pages to achive zero hosting cost.
Reaction Commerce
Reaction Commerce is an open-source, headless, API-first, and modular commerce stack made for ambitious brands and retailers. Reaction’s service-based architecture is built to deliver flexibility and freedom at scale.
DrJava
DrJava is a lightweight programming environment specifically designed for writing Java. Through its design the IDE foster test-driven software development that leads to scalable and maintainable Java applicaitons. DrJava includes an intelligent program editor, an interactions pane for evaluating program text, a source level debugger, a unit testing tool, and a new code coverage tool.
Tailwind CSS
Tailwind CSS is a customizable, low-level HTML & CSS framework. With Tailwind CSS you can create unique UIs without having to write any CSS. The framework comes with pre-written CSS classes that you can add to HTML elements to build bespoke UI components, your way.