Above & Beyond 3.0 - Excellent Windows PIM
  Enjoy Above & Beyond's superb Dynamic
  Scheduling. Feel your productivity surge
  as it streamlines your workflow. Handles
  all types of recurring items. Features
  pop-up alarms, week/month views, timers,
  task tracking, launch apps on schedule,
  contact database, auto-dialing, and more.
  Online Help. Includes workgroup/LAN support.
  Shareware from 1Soft Corp.

  Desktop Assistant (TM) is a personal
  information manager for Windows. It
  includes a To-Do feature, Address book
  with auto dial, perpetual calendar,
  notebook, calculator, alarms, and a
  timer. It's all combined in one simple
  to use interface.

  K Mom for Windows is a Personal Information
  Manager (PIM) that you can use to remind you
  of important things you need to do and to
  remember names, addresses, and phone numbers.
  It includes: Calendar, Event Data Base with
  alarms, Names Data Base that stores names,
  addresses, phone numbers, autodialer and a
  Note Editor.

  Windows Reminder 2.0A (ASP) - To-Do List
  Manager.  Keeps track of to-do lists, set
  alarms (which can launch applications),
  prints reports of completed work or work
  to do. Supports DDE and MSMail.  $59.95