If you don’t need those advanced, high-powered features, Nisus Writer Express is a very decent basic word processor.
Clean Text is a useful tool for cleaning up messy text. It doesn't have as many features as the best text-cleaning offerings, but it provides many of the most-common options for a reasonable price.
MacJournal doesn’t address every problem you may encounter when writing. But if you keep a journal, write a blog (or a couple of blogs), or just want to have a great place to jot down your thoughts without worrying about losing them, then MacJournal 6 is hard to beat.
Venerable Mac text editor BBEdit was released 20 years ago. What's amazing is that it's still around, and still relevant.
Drafts lets you jot down and share short bits of text.
Marked is a great tool for previewing your web writing, whether in Markdown or HTML format. A big update adds new preview styles, change markers, syntax highlighting, Scrivener and Leanpub project support, and more.
Index Card delivers on its promise of organization by index cards, but extremely rough interface choices compromise the experience.
Clean Writer Pro 1.2 is simple and offers limited formatting options, letting writers worry about writing rather than formatting.
It's difficult for the developer of a minimalist writing app to peg exactly what a particular user will like and which features can be removed. But if OmmWriter's interface decisions work for you, it's a solid writing tool with a couple unique features for helping you concentrate.
Smultron is a capable, inexpensive, and easy-to-use text editor with iCloud support built in, although it could use some improvements when working with multiple files.