The most popular alternative is React Native, which is both free and Open Source. If that doesn't suit you, our users have ranked 4 alternatives to Wisej so hopefully you can find a suitable replacement. Other interesting Wisej alternatives are jQuery UI (Free, Open Source), DevExtreme (Free Personal, Open Source) and Kendo UI (Freemium).
- HTML5 Widgets & SPA Framework for Desktop and Mobile.
- Kendo UI is JQuery-based framework for rich UI, build HTML5 apps that look native on any device, build desktop and mobile applications for any browser.