kile

Kile is a user friendly TeX/LaTeX editor for the KDE desktop environment. The main features are:

Compile, convert and view your document with one click.
Auto-completion of (La)TeX commands
Templates and wizards makes starting a new document very little work.
Easy insertion of many standard tags and symbols and the option to define (an arbitrary number of) user defined tags.
Inverse and forward search: click in the DVI viewer and jump to the corresponding LaTeX line in the editor, or jump from the editor to the corresponding page in the viewer.
Finding chapter or sections is very easy, Kile constructs a list of all the chapter etc. in your document. You can use the list to jump to the corresponding section.
Collect documents that belong together into a project.
Easy insertion of citations and references when using projects.
Advanced editing commands.