Use for questions about AngularJS (1.x), the open-source JavaScript framework. Do NOT use this tag for Angular 2 or later versions; instead, use the [angular] tag.

Node.js is an event-based, non-blocking, asynchronous I/O framework that uses Google's V8 JavaScript engine and libuv library. It is used for developing applications that make heavy use of the ability to run JavaScript both on the client, as well as on server side and therefore benefit from the re-usability of code and the lack of context switching.

Swift is a general-purpose, open-source programming language developed by Apple Inc. for their platforms and Linux. Use the tag only for questions about language features, or requiring code in Swift. Use the tags [ios], [osx], [watch-os], [tvos], [cocoa-touch], and [cocoa] for (language-agnostic) questions about the platforms or frameworks.

Visual Basic.NET (VB.NET) is a multi-paradigm, managed, type-safe, object-oriented computer programming language. Along with C# and F#, it is one of the main languages targeting the .NET Framework. VB.NET can be viewed as an evolution of Microsoft's Visual Basic 6 (VB6) but implemented on the Microsoft .NET Framework. DO NOT USE this tag for VB6, VBA or VBScript questions.

React is a JavaScript library for building user interfaces. It uses a declarative paradigm and aims to be both efficient and flexible.

WebSocket is an API built on top of TCP sockets and a protocol for bi-directional, full-duplex communication between client and server without the overhead of HTTP.

Use for questions about any version of Yii, an open-source MVC framework for writing web 2.0 applications in PHP5+

Apache Cordova (formerly PhoneGap) is a framework that allows developers to create cross-platform mobile applications using web technologies like HTML, JavaScript, and CSS.

iOS is the mobile operating system running on the Apple iPhone, iPod touch, and iPad. Use this tag [ios] for questions related to programming on the iOS platform. Use the related tags [objective-c] and [swift] for issues specific to those programming languages.

Xamarin is a platform consisting of Xamarin.iOS, Xamarin.Android, Xamarin.Mac and Xamarin Test Cloud. It allows you to write cross-platform native Apps for iOS, Android and Mac and follow your app through its entire lifecycle. The introduction of Xamarin.Forms supports Native UI development for iOS, Android and Windows

NumPy is a scientific and numerical computing extension to the Python programming language.

Jython is an open-source implementation of the Python programming language in Java.

SciPy is an open source library of algorithms and mathematical tools for the Python programming language.

ASP.NET Core is a lean, composable and cross-platform framework for building web and cloud applications. It is fully open source on GitHub. ASP.NET Core apps can be run on Windows with the full .NET Framework or smaller .NET Core, or on Linux and MacOS with .NET Core and Mono.

The ASP.NET MVC Framework is an open source web application framework and tooling that implements a version of the model-view-controller (MVC) pattern tailored towards web applications and built upon an ASP.NET technology foundation.

Language Integrated Query (LINQ) is a Microsoft .NET Framework component that adds native data querying capabilities to .NET languages. Please consider using more detailed tags when appropriate, for example [linq-to-sql], [linq-to-entities] / [entity-framework], or [plinq]

Extensible Markup Language (XML) is a flexible, structured document format that defines human- and machine-readable encoding rules.

Drupal is an open source CMS framework written in PHP. *IMPORTANT* Rather than using this tag, consider posting your question directly on https://drupal.stackexchange.com/. Also, because of substantial differences between major versions, consider using either the drupal-6, drupal-7 or drupal-8 tags.

Firebase is a serverless platform for unified development of applications for mobile devices and for the Web.

Joomla! is a free and open source Content Management System (CMS) for publishing content on the World Wide Web and intranets and a model–view–controller (MVC) Web application framework that can also be used independently. Joomla questions can also be asked on https://joomla.stackexchange.com/