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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.

Texmaker is a free LaTeX editor, that integrates many tools needed to develop documents with LaTeX, in just one application.

TeX Live is an easy way to get up and running with the TeX document production system. It provides a comprehensive TeX system with binaries for most flavors of Unix, including GNU/Linux, and also Windows. It includes all the major TeX-related programs, macro packages, and fonts that are free software, including support for many languages around the world.

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.

TeXnicCenter is a feature rich and easy-to-use integrated environment for creating LaTeX documents on the Windows platform. Its powerful editor and its tight integration with the LaTeX environment helps you to concentrate on what matters: The content of your document. And best of all: TeXnicCenter is open source software and available completely free of charge!

Kile is a TeX/LaTeX editor providing a user friendly environment to edit TeX/LaTeX source code.

TexMaths is an addon designed to provide LaTeX support into LibreOffice. LaTeX equations can be inserted as images (SVG or PNG formats) and the LaTeX code

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.

LaTeXila is an Integrated LaTeX Environment for the GNOME Desktop, written in Vala and covered by the GPL 3 license. Here is a summary of the functionalities:

The TeXworks project is an effort to build a simple TeX front-end program (working environment) that will be available for all today’s major desktop operating systems—in particular, MS Windows (XP and Vista), typical GNU/Linux distros and other X11-based systems, and Mac OS X. It is deliberately modeled on Dick Koch’s award-winning TeXShop for Mac OS X, which is credited with a resurgence of TeX usage on the Mac platform.

TeXShop is a TeX/Latex editor and previewer for Mac OS X, written in Cocoa.

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)

BaKoMa TeX system for Scientific Publishing. One of its main features is instant preview: The document is typeset as you write, providing true WYSIWYG experience not usually found in LaTeX editors.

WinShell is a free integrated development environment (IDE) for easy working with LaTeX or TeX. It includes a text editor, different tool bars and user configuration options. It is NOT a LaTeX system. An additional LaTeX package for Windows is needed.

TeXlipse is a plugin that adds Latex support to the Eclipse IDE. It supports Syntax highlighting, Document outline, Code folding, Templates, Build support, also partial building, Annotations for errors (while editing), Content assist (completion of commands and references), Easy navigation with F3, Outline of the current file and the full project, Spell checking, Menu with common LaTeX math symbols, BibTeX editor and BibTeX-support, Line wrapping, Table editorSupport for several platforms (Windows, Linux, OS X), ...and many more »