ShareLaTeX which is integrated with Overleaf now.
Online LaTeX editors and best for working individully or collaboratively online.
TeXLive + Visual Studio Code + LaTeX Workshop.
Very productive combination for writing LaTeX.
Online Markdown editor and good for writing simple documents and converting them into different format.
Very impressive offline Markdown WYSIWYG editor. Very powerful in converting markdown to other formats.
Most prowerful integration of (R)markdown, R and LaTeX. This combination will be a popular tool set for typesetting in the future.