SFHD

Stellarium - Stellarium is a planetarium utility designed for Mac.

xPad - It's an application that will help you edit text documents in an easy way.

TeXworks - A powerful application that allows users to edit TeX files.

Texts - Texts helps you create and edit documents using the Markdown file format.

textroom - TextRoom is a cross platform full screen rich text editor for writers.

TextMate - A lightweight text editor for writing not only notes but also code.

TextExpander for Mac - TextExpander (was Textpander) is a customizable typing shortcut tool that saves time and keystrokes.

TeXShop - A straightforward previewer for TeX, a specialized typographic system.

Texpad : LaTeX editor - Texpad is a LaTeX editor designed for straightforward navigation of projects of any size.

Texmaker - Program that integrates many tools needed to develop documents with LaTeX in just one application.

Sublime Text - Write and edit various text files using syntax highlighting and a spell checker.

Sublime Text 2 - Sublime Text is a sophisticated text editor for code, html and prose.

Storyist - Write quality manuscripts and screenplays in a user-friendly tool.

Scrivener - Project management and writing tool for writers of all kinds that stays with you from that first unformed idea all the way through to the first...

Scribus - A flexible, full-featured desktop publishing tool.

MMD2XHTML

MMD2OPML

MMD2ODF

MMD2LaTeX - MultiMarkdown - turn minimally markedup plain text into well formatted documents

Mou - Markdown editor - with a difference: where most, if not all...

Mellel - Leading word processor for OS X and has been widely considered the industry standard since its inception.

MacVim - Vim is a highly configurable text editor built to enable efficient text editing.

LightPaper - A text editor that supports the markdown language.

LibreOffice - Office suite (word processor, spreadsheet, presentations, drawing tool) compatible with other major office suites.

Komodo Edit - Free, multi-language editor that makes it easy to write quality code.

KoalaWriter - KoalaWriter is a simple text editor with an attractive appearance.

Jers Novel Writer - Jer's Novel Writer is a relatively simple word processor with extra features to support large creative writing projects.

Fraise - Fraise is a free text editor which is both easy to use and powerful.

FocusWriter - Stay focused on your writing without any distractions.

Bean - Bean is a text editor that can save and open in a useful set of formats.

Aquamacs - A powerful, open-source editor for developers and programmers.

Vitamin-R 2 - ▷ 4.5/5 Stars, Macworld Recapture the Lost Art of Joyful Concentration.

Time Out - Always remember when it's time for a break from your work.

Think - Think could be considered a productivity tool for the Mac.

TeamViz - TeamViz is a planning and task tracking tool for your team.

Slife - Slife makes it impossibly easy to keep track of time and stay productive.

SelfControl - Block your access to various websites and mail servers.

RescueTime - RescueTime is a web-based time management and analytics tool.

Offline Time

NovProg2 - NovProg is a tool to graph your progress in writing a NaNoWriMo style novel.

Menubar Countdown - Menubar Countdown is a nifty countdown clock for Mac OS X.

Klok2 - Klok shows your time entries as blocks that fill up your days...

Kapow - Kapow is a punch clock program designed to easily keep track of your hours.

Eggscellent - Easily manage your daily assignments and get work done.

Concentrate - Fewer distractions, more productivity.

Awareness - Become more aware of time spent on the computer by playing the sound of a singing bowl to mark every hour of continuous computer use.

XMind - Most popular mind mapping tool.

TheBrain - TheBrain (formerly PersonalBrain) creates a digital home for your mind.

Freeplane - Freeplane is a mind-mapping application designed for Mac.

FreeMind - FreeMind is a mind mapper, and at the same time an hierarchical editor.

Wondershare PDF Editor - Edit, convert, and annotate PDF files.

VitalSource Bookshelf - Most advanced e-book software in the world.

Stanza - Program for reading eBooks, digital newspapers, and other digital publications.

Skim by the Skim Team - Easily view, edit, or annotate miscellaneous PDF files.

PDF Expert - Read, insert annotations, and merge multiple PDF documents into one.

MacDjView - An application for viewing DjVu files with continuous page layout support.

MacDigibib

Kobo

FBReader - FBReader is an e-book reader for Unix/Windows computers. FBReaderJ is an...

eReader Pro - Read and navigate your e-books from the eReader website.

DjVuReader - Most fully featured reader for DjVu files available on the Mac store.

Digested - Quickly import bookmarks and notes from iBooks on iPhone, iPod, iPad.

PDFSlide - It can be used to display PDF-based presentations.

OmniDazzle - Set of fun and useful enhancements that help you highlight certain areas of your screen...

Keynote - Incredible presentations, incredibly easy.

iSkysoft PDF Converter Pro - This app helps you convert PDF files to other formats.

PDF Paper Renamer - This application lets you batch rename PDF files on your Mac.

PdfMasher - Convert your PDF articles to MOBI and EPUB formats.

PDF Unlocker - PDF Unlocker allows you to remove security from PDF files.

PDF Renamer

PDF Shrink - Compress your PDF documents with just a few clicks.

PDF OCR X Community Edition - PDF OCR X is a simple drag-and-drop utility that converts your PDFs into text or searchable PDF documents.

PDF Index Generator - This application generates the back of your book index.

Name Mangler - Quickly rename dozens of your files with minimum effort.

DiffPDF - With DiffPDF, you can compare two .pdf files, textually or visually.

Todoist: To Do List | Task List - Create to-do lists and keep track of your daily assignments.

Todour - App for handling todo.txt files.

TodoTxtMac - TodoTxtMac is a minimalist, keyboard-driven to-do manager for Mac OS X.

QTodoTxt - qtodotxt is a fast, cross-platform todo.txt GUI written in Python.

jdotxt - jdotxt is an open source, cross-platform tool for managing your todo list.

TiddlyWiki

ThinkingRock - Collect, organize, and process your thoughts.

Keygen

TaskPaper - Keep track of your daily tasks directly from your Mac.

TaskCoach - This application helps you manage your daily tasks.

Rainlendar2-Lite

OmniPlan - Makes project planning a lot easier and efficient.

Nottingham - A program for storing notes, ideas, and many others.