Remember The Milk - Remember The Milk is a task and time management application for mobile devices.
Free Alarm Clock - Free Alarm Clock is a free, full-featured and user-friendly computer alarm clock for Windows.
Notepad Checklist - A checklist made by notepad.pw, easy short and fun to use.
Gnome Clocks - Clock application designed for GNOME 3
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
AlarmDJ - Online Alarm Clock - Use YouTube videos or MP3 files as alarm sound. Works offline.