A web component compiler for building UI components
Realtime application framework (Node.JS server)
Rich, real-time user experiences with server-rendered HTML
Database Reporting Tool and Tasks (.Net)
Light and powerful C++ web framework for web applications
Build reactive applications with the Rails tooling you already know
Fortio load testing library, command line tool, advanced echo server
TreeFrog Framework, High-speed C++ MVC Framework for Web Applications
Internet Archive's open-source, web-scale, web crawler project
Easy to audit, zero-dependencies and build-tool-free
Fast math typesetting for the web.
HTTP for Julia
A web based file manager, web IDE / browser based code editor
Hawtio web console helps you manage your JVM stuff and stay cool
An OOB interaction gathering server and client library
The JavaScript / Wasm runtime that powers Cloudflare Workers
Realtime Web Apps and Dashboards for Python and R
The meta-framework suite designed from scratch for web development
n-browser Streamlit
C++ Qt ORM (Object Relational Mapping) and ODM library
The BBC's Open Source Single Page Application
The comprehensive WSGI web application library
RStudio is an integrated development environment (IDE) for R
OpenID Connect Relying Party and OAuth 2.0 Resource Server
Web Crawler/Spider for NodeJS + server-side jQuery