These elements of user interface are very flexible and optimized to provide high productivity, 80% of companies from the Fortune 500 list use them. Syncfusion Essential Studio Enterprise Edition Syncfusion Essential Studio Enterprise Edition by Syncfusion - is a set of more than 1600 programming components and frameworks for various application development. In this top rating we included Progress Kendo UI, Рandas Рython, Angular Material, Syncfusion, NGX Bootstrap, Progress Telerik UI, DHTMLX UI and some others. Let’s have a view on the libraries and instruments the developers often choose. Connected to web-frameworks or/and instruments of mobile development.Unlocked components available (can be set after they are extracted from libraries).Compatibility with one or many programming web or mobile development languages.Many application components designed as libraries.Here are the main criteria of including an element to component library: Usually, component libraries are based on one language, for example Reach, Angular, HTML or. Component libraries cover a wide range of user interface elements, including buttons, diagrams, slides and many others. These components make the development process more effective, since the developers can focus on minor details and application optimization, instead of working on the functions that have already been developed. They offer ready solutions, sets of components or functions for the developers, which can be used in mobile or web applications. Component libraries are often called components of user interface or libraries of user interface.