LyX 2.1.4 recently released, is a fully featured document processor that encourages an approach to writing based on the structure of your documents (WYSIWYM) and not simply their appearance (WYSIWYG). With LyX, you use a set of predefined styles and apply on your document content, this makes sure that the resulting document will be typographically correct and good looking visually. You can apply various style changes and LyX will apply the same style throughout the document, hence making sure that your document is consistent in its look.
Texmaker is a clean, highly configurable LaTeX editor with good hot key support and extensive LaTeX documentation. Texmaker integrates many tools needed to develop documents with LaTeX, in just one application. It has some nice features such as syntax highlighting, insertion of 370 mathematical symbols with only one click, and “structure view” of the document for easier navigation. Texmaker includes unicode support, spell checking, auto-completion, code folding and a built-in pdf viewer with synctex support and continuous view mode