Smultron is a really nice, minimalist code editor (w/ syntax highlighting) and line counts. Freeware.
CopyWrite is a great text editor (my favorite) esp for complicated tasks (academic papers). All projects are stored in their own "container" a tab at the top lets you select your project and you right in the Windows below. You also get a side bar where you can keep notes on the entire project and each individual entry. Shareware. $29.95 US.
Instead of using Word (which I find is god-awfully slow), I'm using a combination of CopyWrite and Pages to do all my University work. It helps streamline everything. CopyWrite, at least for me, is a "killer" app.

