Obsidian

The Obsidian App is described as a powerful knowledge base for plain text Markdown files located above the Local folder.

It will always be a second brain for you. Now available for Android mobile devices!

Highlights include:
- Toolbar that can be customized 
- Quick actions for demolition
 - View graph
 - Share to and from obsidian
 - Community Additions
 - Themes 
- Install a tablet sidebar