Opal lets you organize just about anything — ideas, reports, lists, notes, projects, graphics — in the form of an outline. If you used Acta, you’ll love Opal.
Cost / License
- Paid
- Proprietary
Platforms
- Mac




Orgzly Revived is described as 'Outliner for taking notes and managing to-do lists' and is a Note-taking tool in the office & productivity category. There are more than 50 alternatives to Orgzly Revived for a variety of platforms, including Mac, Windows, Web-based, iPhone and iPad apps. The best Orgzly Revived alternative is CherryTree, which is both free and Open Source. Other great apps like Orgzly Revived are Workflowy, QOwnNotes, Dynalist and Org mode.
Opal lets you organize just about anything — ideas, reports, lists, notes, projects, graphics — in the form of an outline. If you used Acta, you’ll love Opal.




Buzz is a fast graphical editor for XML files with special support for OPML. Using the OPML convergence tools it will edit about any outline and many forms of indented text, including Python. In fact, Buzz was written with Buzz!






Instead of dealing with unmanageable heaps of information, work with freeform, searchable personal knowledge databases. With TreeProjects, you can become productive in just a few minutes.



