Mature plugin which provides functionality for editing, building, and previewing (La)TeX documents. Site contains documentation, screenshots and downloads.
Plugin for LaTeX documents that supports syntax highlighting, dynamic document outlining, a dynamic autocompletion engine driven by a user-extensible XML database and BibTeX reference management. (Also knows as ecleTeX.)
Environment for editing LaTeX in Vim. Huge set of menus and shortcuts, improved syntax, compiler and ftplugin files, and recognition of \usepackage commands.
A simple text editor based on the script language Tcl/Tk, especially adapted to LaTeX written by Martin Strauss. Contains short description, downloads and screen shots.