Journaley - A simple and elegant open-source journal keeping software for Windows compatible with Day One
Future Me - Send an email to your future self
GloboNote - GloboNote is a free and easy to use desktop note taking application.
Dabble Me - Your own private place to write. A journal/diary to help you remember what's happened in your life.
Jot+ Notes - Jot+ Notes is a software that acts as a text compressor, offering you to compose, arrange and manage notes, recipes collection, work records, contacts, to-do lists, addresses, and personal information.
Letter to my future self - Letter to my future self is a prominent email scheduling service that gives you the opportunity to create a letter with goals and thoughts for your future self and schedule a date for sending it.