Outspline

Extensible outliner and personal time organizer to manage todo lists, schedule tasks, remind events.

Free Open Source Linux Python wxPython

CarbonFin Outliner

Great application for creating lists and outlines that need to be accessible anywhere, good for reoccurring shopping lists or check lists / notes on how to do a...

Commercial iPhone iPad Web

Outlinely

Indispensable information organization tool for knowledge workers. Outlinely is the home for all your notes, thoughts, ideas and todos. It’s an elegant outliner and...

Commercial

buzz.opml

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...

Free Open Source Mac OS X Windows Linux

Opal

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.

Commercial Mac OS X

NeO

NeO is a powerful outliner built for OS X. Using NeO, you can efficiently manage and organize pieces of information. NeO supports basic outliner facilities, such as...

Commercial

Outliner

Organize shopping lists, tasks, todo-lists, ideas and all kinds of memos. Or use it as a project management tool. Do it in a tree-structure with collapsable nodes. ...

Freemium Android

Vimflowy

vimflowy is an innovative, open-source notebook and list making app that combines the infinite list and note taking powers of workflowy with a http://alternativein .

Free Open Source Web Self-Hosted