Adobe InDesign
It says: From books and brochures to digital magazines and iPad apps, InDesign CC helps you create pixel-perfect page designs and typography. Easily adapt layouts for multiple page sizes, screen sizes, or orientations.
License: Commercial, Trial available
http://www.adobe.com/products/indesign.html
Bean
It says: Bean is a small, easy-to-use word processor that is designed to make writing convenient, efficient and comfortable.
License: Freeware
http://www.bean-osx.com/Bean.html
EndNote
It says: EndNote is the industry standard software tool for publishing and managing bibliographies, citations and references.
License: Commercial, Trial available
LaTeX
Wikipedia: LaTeX is a document preparation system and document markup language. It is the de facto standard for the communication and publication of scientific documents in many fields, including mathematics, physics, and computer science. LaTeX uses the TeX typesetting program for formatting its output, and is itself written in the TeX macro language.
Note: LaTeX is NOT an application, it is a markup language that you need to learn bevor you can work with it! And you need to install a LaTeX distribution AND an application.
License: Mostly Freeware, but also commercial sometimes
LaTeX Distribution: http://www.tug.org/mactex/ (includes TeXShop)
Applications:
TeXShop: http://pages.uoregon.edu/koch/texshop/texshop.html
iTeXMac: http://itexmac.sourceforge.net
LyX: http://www.lyx.org
Latexian: http://tacosw.com/latexian/
MathType
It says: MathType is a powerful interactive equation editor that lets you create mathematical notation for word processing, web pages, desktop publishing, presentations, elearning, and for TeX, LaTeX, and MathML documents.
License: Commercial, Trial available
http://www.dessci.com/en/products/mathtype/
Mellel
It says: Mellel is a fully featured, agile word processor for Mac OS X.
License: Commercial, Trial available
Ulysses
Very good creative writing text editor.
License: Commercial, Trial available