Ionic X - Alternatives

Hi Guys,

I am a university student who has been engaging in a lot of projects and hackathons. I am very pleased/obsessed with the Ionic Framework and have been incorporating the framework in my projects for sometime now. I have a major hackathon coming up soon and I am trying to quickly
setup a prototype before we start development. The Ionic X tool really sparked my interest and was really excited about it but sad that it hasn’t been released as yet.

My question is, What similar tools exist that allow for easy prototyping without that much knowledge of UI/UX? I like the idea of drag and dropping components and them personalizing the styles. If it offers the source code being available after the design is completed then that would be a bonus.

Any insights would be greatly appreciated.