Cassiopeia!

LyX is a document processor. It combines the power and flexibility of TeX/LaTeX, an advanced typesetting system, with the ease of use of a graphical interface.

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.

Gummi is a lightweight LaTeX editor for the Linux/GTK+ platform, released as free open-source software. It is designed with simplicity in mind and includes features that will make a novice LaTeX user quickly become accustomed to this mark-up language. This is a relatively young project, but under active development. Gummi attempts to conform to GNOME's Human interface guidelines but will run on any Linux desktop environment provided that the GTK+ toolkit is available.

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.

VerbTeX is a free, collaborative LaTeX Editor for your Android device. It allows you to create and manage LaTeX projects directly on your Android device and generate a PDF by using Verbosus (Online LaTeX and Octave Editor)

WIRIS editor is a visual editor (WYSIWYG) that allows inserting mathematical formulas in web pages. It runs on any browser, including the ones in tablet PCs, as is based on HTML4 and JavaScript technology. Plus it is of course 100% compliant with HTML5.

Small GUI to display LaTeX expressions and then copy to clipboard or save the result. Ekee produces images interactively from LaTeX expressions. Drag and drop in several common formats (PNG, SVG, PDF, EPS) to other applications is supported. Ekee can reopen the equations it has created in PNG format.

TtM translates from Plain TeX and LaTeX into HTML including the equations in the form of embedded MathML.

As an integrated environment, TeXpert allows users to edit, compile (generate PDF output) and view the result within a single app. As a result, it provides the convenience and productivity because it eliminates the hassles of switching back and forth between different applications. In this context, one does not have to open, say TeXPortal, to (re)compile the document and wait for it to complete then open generated PDF with another app; finally using Android's Recent apps button to go back to continue editing the file. »

Tex2Img is a free online Latex equation editor that converts Latex equations to high resolution images to embed in documents and presentations. You can also use Tex2Img to learn Latex by trial and error. You can change the equation background color, text color, transparency, font size, and output image format (PNG, GIF, JPG, TIF, BMP, PNM, EPS, FIG, PS). Unlimited uploads and no registration or email is needed.

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. »

In brief, latexml is a program, written in Perl, that attempts to faithfully mimic TeX’s behaviour, but produces XML instead of dvi. The document model of the target XML makes explicit the model implied by LaTeX. The processing and model are both extensible; you can define the mapping between TeX constructs and the XML fragments to be created. A postprocessor, latexmlpost converts this XML into other formats such as HTML or XHTML, with options to convert the math into MathML (currently only presentation) or images. »

TeX4ht is a system for converting documents written in TeX/LaTeX/ConTeXt/etc. to HTML, various XML flavors, braille, etc., optionally using MathML.