Future Me - Send an email to your future self
Digit - SMS bot that monitors your bank account & saves you money
Dabble Me - Your own private place to write. A journal/diary to help you remember what's happened in your life.
Quicken - Stay in control of your monthly cash flows, budgets, and expenditures. Quicken provides a navigable interface where you can organize your debit, credit, and savings, and build good habits accordingly.
Letter to Yourself - Send a physical letter to your future self
Money Manager Ex - Money Manager Ex is a free, open-source, cross-platform, easy-to-use personal finance software.