Sublime Text 3 will help you edit your code easily and fast! Get it once and it can be used on all of your computers no matter if they are Mac, Windows or Linux. This development editor tool comes with features, that once you get used to, you will never want to work without.
TinyMCE is a powerful and stable WYSIWYG HTML editor. It comes with more than 40 editing tools and premium features such as improved spell check, file management and upgraded copy-paste.
CKEditor 5 is a set of ready-to-use rich text editors created with a powerful framework that enables you to create any kind of text editing solution and include real-time collaborative editing inside.
AxMath is an interactive WYSIWYG equation editor. It enables you to type formulas faster than handwriting. It has all kinds of functionalities which make you type equations at lightspeed. Key features include semantic math input, auto calculation, LaTeX conversion, memory board, etc. It currently supports Win7/8/10 and Office 2010-2016.