Texmaker is a free LaTeX editor, that integrates many tools needed to develop
documents with LaTeX, in just one application.  Texmaker runs on UNIX, MacOS X
and Windows systems and is released under the GPL license.
  -- Features --
* An unicode editor to write your LaTeX source files (syntax highlighting,
  undo-redo, search-replace, spell checker...)
* The LaTeX tags can be inserted directly with the "LaTeX" and "Math"  menus
* 370 mathematical symbols can be inserted in just one click
* Wizards to generate code ('Quick document', 'Quick letter', tabular, tabbing
  and array environments)
* LaTeX-related programs can be launched via the "Tools" menu
* The standard Bibtex entry types can be inserted in the ".bib" file with the
  "Bibliography" menu
* A "structure view" of the document for easier navigation of a document (by
  clicking on an item in the "Structure" frame, you can jump directly to the
  corresponding part of your document
* Extensive LaTeX documentation
* In the "Messages / Log File" frame, you can see information about processes
  and the logfile after a LaTeX compilation
* The "Next Latex Error" and "Previous Latex Error" commands let you reach the
  LaTeX errors detected in the log file
* By clicking on the number of a line in the log file, the cursor jumps to the
  corresponding line in the editor
* An integrated LaTeX to html conversion tool