Texmaker is a free, modern and cross-platform LaTeX editor with an integrated PDF viewer and other tools needed to develop documents with LaTeX, in just one application.
Texmaker includes unicode support, spell checking, auto-completion, code folding and a built-in pdf viewer with synctex support and continuous view mode. Texmaker is easy to use and to configure.
I'm unable to build my files. Says that it requires revtex4-1.cls. The problem is not the App but the fact that the underlying tex/latex distribution needs to be updated.
mainly it is used for pdf formats