Holiline Reminder Alternatives for Mac OS X

Microsoft Outlook is a personal information manager from Microsoft.

Todoist: To-Do list and Task Manager.

Things is a delightful and easy to use task manager.

A simple and friendly task manager written in Python.

Rainlendar is a calendar program for Windows, Mac OS X and Linux.

Doit.im is a Cross-platform Best Online GTD Service, which can sync with Phones.

TickTickis a cross-platform to-do list app & task manager helps you to get all things done and make life well organized.

Org-mode is an Emacs Mode for Notes, Planning, and Authoring.

2Do lets you take a completely different approach to managing your tasks. With its extremely simple-to-use interface.

Taskwarrior is an open-source, cross platform time and task management tool. It has a command-line interface rather than a graphical user interface.

Nitro is free open source task management software.

Tasque is an open source task management application.

Conqu is a simple yet powerful task management tool designed to help you conquer your inbox and get things done.

Nozbe is a to-do, task, project and time management application.

buckets.co helps you optimize workflows & collaboration at all levels.