Free Software for Self-Hosted
Drash
A REST microframework for Deno's HTTP server with zero dependencies. Drash is designed to help you build your projects quickly with the ability to scale. With Drash you can build a Deno-based API, web app, SPA, or static HTML site.
Phoenix LiveView
Phoenix LiveView enables rich, real-time user experiences with server-rendered HTML. LiveView is free and open-source tool built for the Elixir framework Phoenix. It allows you to use a declarative model to render HTML on the server over WebSockets with optional LongPolling fallback. It also comes with templating and change tracking, live form validation with upload support, rich integration API with the client with phx-click, phx-focus, phx-blur, phx-submit, and a phx-hook for the cases where you have to write JavaScript.
Hotwire
Hotwire or HTML Over The Wire is an alternative approach to building modern web applications without using much JavaScript by sending HTML instead of JSON over the wire. Hotwire is a newly released project from the guys at Basecamp, and the Ruby on Rails creator David Heinemeier Hansson. The project aims to simplify the process of building web-based apps as a small team or solo developer. The concept is however not new, it dates back years, and we have seen implementations being done before. Laravel Livewire, Phoenix Liveview and HTMX is similar implementations of the concept or serverside render blocks of HTML dynamically.
HTMX
HTMX is a HTML-first web framework that allows you to access AJAX, CSS Transitions, WebSockets and Server Sent Events directly in HTML Markup, using attributes. With HTMX, developers can quickly build emmersive experiences and modern user interfaces without having to worry about REST APIs or complicated frontend JavaScript configurations. HTMX weighs in at just under 10k min.gz'd and is completley dependecy-free.
Rollup
Rollup is a module bundler for JavaScript which compiles small pieces of code into something larger and more complex, such as a library or application. It uses the new standardized format for code modules included in the ES6 revision of JavaScript, instead of previous idiosyncratic solutions such as CommonJS and AMD.
Botpress
Botpress is an open-source conversational AI platform with wide range of functionalities. With Borpress you can create bots for task automation and chat automation like FAQs and helpdesks. The software have no external dependencies and can be deployed on common platforms. Botpress provides built-in natural language understanding, channel integrations, analytics, an SDK and a studio tool that makes it easy to create and manage your conversational design work.
OpenCog
OpenCog is an open source artificial intelligence framework. The project is witten in Scheme and developed by the OpenCog foundation and aims to make artificial intelligence more pallatable to developers. OpenCog and OpenCog Prime is an architecture for robot and virtual embodied cognition that defines a set of interacting components designed to give rise to human-equivalent artificial general intelligence as an emergent phenomenon of the whole system.
Puppeteer
A Node.js library that provides a high-level headless Chrome API over the DevTools Protocol. Puppeteer is free and open source and can be used to generate screenshots and PDFs of web pages, crawl SPAs, scrape content from websites and auto submit forms and keyboard inputs for ui/ux testing.
Pyodide
Pyodide is a scientific Python stack that compiles to WebAssembly allowing you to run the Python 3.8 runtime to the browser via WebAssembly. With Pyodide you can run popular libraries such as NumPy, Pandas, Matplotlib, SciPy, and scikit-learn in any modern browser.
Jest
A delightful free and open source testing framework for JavaScript that focus on simplicity. With Jest you can test your application written built with Babel, TypeScript, Node.js, React, Angular and Vue.js, in a simple, config free manner.