I use this one: https://www.lyx.org/; it's free.
With MonsterWriter you also can export into other formats like Markdown, HTML or directly publish on a ghost blog.
Also you do not need to install LaTeX on your system. The typesetting is done on a server. For this the content is encrypted and is only processed in plaintex for the purpose of generating the PDF.
The same with Lyx; it's even often criticised by LaTeX experts since it hides it very well and it is not particularly well suited to fiddle directly with the generated code.
But maybe I did not got it right back then.
While both apps serve the same use case right now. The vision for MonsterWriter is to run in the Browser and support real time collaboration.
Cert seems to have expired two days ago.