There are a wide variety of LaTeX front-ends out there. I recently discovered Texmaker and I like it a lot. It’s not quite Mac native, so the interface takes a little getting used to, but has a nice syntax-coloring editor, some latex-specific menu items for inserting symbols and math, and it is free. You can download it here, but I would recommend installing aspell (for spell checking) via macports instead of using fink. Â