latex4technics - Online LaTeX editor with autocompletion, highlighting and 400 math symbols.
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Lagrida Latexeditor - Lagrida Latexeditor is an all-in-one website that lets you edit, write or check the authentication of your mathematical equations or symbols in a decent manner without any hassle.
Wondershare PDFelement - All-in-one PDF editor
Hostmath - Hostmath is a user-friendly mathematical symbol or equation editor that provides you an opportunity to edit your entire difficult equation in seconds.
Microsoft Word - Microsoft Word is a commercial word document processor for Windows.