Simply Remind Me - Free email and text reminder service so you don't forget the important things in life!
Digital Clock 4 - Beautiful customizable clock with plugins
FollowUpThen - The simplest way to schedule an email reminder
System Scheduler - System Scheduler for Windows, Free Task Scheduler Software replace Microsoft Windows Task Scheduler
Kana Reminder - Kana Reminder is a program which can be used to set a reminder to be triggered at a specified time.
VisualCron - VisualCron is an automation, integration and task scheduling tool for Windows.