There are more than 70 UI widgets and controls: charts, reports, pivots, complex tools and other components that can help you to visualize big data.
Ranked in these QuestionsQuestion Ranking
Pro Seems to be quite stable
Even the most complicated GUIs are bug-free most of the time.
Pro Extremely simple to implement.
To get started is extremely simple. It has a low learning curve.
Pro A lot of widgets
Webix is one of the most extensive UI component libraries, second only to Sencha ExtJS. Not only considering the number of widgets, but also the API methods for manipulating these widgets.
Pro Great support from the webix team
The company behind webix is really quick in answering any questions you have on their forum or via email.
Pro Webix Jet
The webix Jet library adds all the required features for SPA development (routing, template loading, ...)
Con Not very popular
Not really a reason to not recommend it. But it has still a small user base. It deserves a lot more attention.
Con Not modular
The library is not modular (except for some additional more complex widgets). If you only need a few widgets, you still need to include the entire library.
Con Commercial license
It's not free for commercial applications.