topydo

A command-line todo list application using the todo.txt format.

Holiline Reminder

Holiline Reminder is both an event reminder and a calendar.

Nozbe

Nozbe - to-do, task, project and time management productivity gtd getting things done online application with software for Apple iPhone iPad Android Mac Windows Linux

Reminder Commander

Reminder manager that reminds you about important events in advance.

Scheduled tasks

GNOME GUI for configuring a users’ cron (automatic jobs). Some of its features are:

Simple Calendar

A simple calendar with events (optional recurring and reminders), week numbers and a customizable…

Top Task List

Top Task List is simple, elegant and responsive task organizer.