You could have downloaded Monologue 1.0.1 for Mac from our software library for free. The program relates to Productivity Tools. This Mac app was originally created by Apptorium.
From the developer:
Write down your thoughts and memories, neat and simple. We all write things down. Our thoughts, ideas, and memories. And most of us want these notes to be easy-to-make but still organized. Write down things that matter. Use hashtags to highlight important words and get back to them quickly.
You may want to check out more Mac applications, such as The Saint: Abyss of Despair, which might be related to Monologue.