KivyMD is a collection of Material Design compliant widgets. Use with the [kivy] and [python] tags

App store approval is off-topic for Stack Overflow. Questions marked with this tag concern the approval process of an iOS or OS X application by Apple before the application is added to the App Store. If this applies to your question, it is very likely off-topic.

Oracle Data Provider for .NET (ODP.NET) features optimized ADO.NET data access to the Oracle database.

TinyMCE is an open source WYSIWYG HTML editor that provides a modern rich text editing experience for web applications. Use this tag for questions regarding the usage of TinyMCE and its integration with CMSs and other web-based applications.

jQuery File Upload is a blueimp.net widget with multiple file selection, drag&drop support, progress bar and preview images for jQuery.

Handle is an abstraction of a resource or a reference to an entity. It can have different implementations: a pointer, an index in a table etc.

QUESTIONS ABOUT POSTFIX ADMINISTRATION ARE OFF-TOPIC. Server admin questions may be asked on Server Fault. Postfix is a free, open-source, widely used cross-platform mail server (mail transfer agent), available on all common platforms.

High Performance Computing (HPC) refers to the use of supercomputers and computer clusters to solve a wide range of computationally intensive problems.

Questions about complex numbers (numbers in the form of x + y∙i where i² = -1), types to represent them in programming languages, and libraries to manipulate them

Azure Data Explorer is a fast and highly scalable data exploration service for log and telemetry data. It helps you handle the many data streams emitted by modern software, so you can collect, store, and analyze data. Azure Data Explorer is ideal for analyzing large volumes of diverse data from any data source, such as websites, applications, IoT devices, and more.

Laravel Mix provides a clean, fluent API for defining basic webpack build steps for your applications. Mix supports several common CSS and JavaScript pre-processors.