Paperspade!

Overleaf, formerly WriteLaTeX, is a collaborative writing and publishing system that makes the whole process of producing academic papers much quicker for both authors and publishers.

KLatexFormula is an easy-to-use graphical application for generating images (that you can drag and drop, copy and paste or save to disk) from LaTeX equations. It is written in Qt4.

MathCast is an equation editor, an application that allows you to input mathematical equations. These equations can be used in written documents, webpages, and even databases. They could be rendered graphically to the screen, to picture files, or to MathML - today’s leading standard language for describing mathematics.

MathType is a powerful interactive equation editor for Windows and Macintosh that lets you create mathematical notation for word processing, web pages, desktop publishing, presentations, elearning, and for TeX, LaTeX, and MathML documents.

MathMagic Equation Editor for Desktop Publishing software & Word Processors, Adobe InDesign, QuarkXPress, MS Word, iWork, for Technical writing with very easy interface and fast input.

Equation Illustrator is a tool for math and technical graphic work that helps you format and align formulae.

iMathEQ is a mathematics equation or formula editor. It is a WYSIWYG online equation/formula editor. It allows users to input, edit, print math equation or expressions. Provide interface for easy integration with web site or mobile app at affordable price. It adds mathematics formula/equation/expression based communication, chatting, publishing, ect., functions to a web site or mobile app. It support a rich set of mathematics and science symbols. It supports popular browsers and platforms including Android and iOS. »