buzz.opml has been discontinued. Similar apps include Workflowy, which has a free version. Other options are Orgzly, OmniOutliner, Orgzly Revived and TreeLine. You can choose from more than 10 Note-taking Tools like buzz.opml for Mac, iPhone, Windows, iPad and Linux.
Outspline is a free and open-source modular outliner whose functionality can be extended with addons. The most important addon is Organism, which adds advanced time management features and turns the application into a personal organizer, perfectly suited for working with todo...
Natara Bonsai is a Palm OS and Windows Mobile outliner application with a Windows desktop client that also works as a full-featured standalone outliner and task manager. The Bonsai 5 Desktop Edition offers multiple views of a hierarchical outline: single-, dual- or triple-pane...
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Cross-platform app for Mac, iPhone, iPad, and iPod Touch. Sync outlines between computers and devices with iCloud. Sync outlines with Evernote, Import and export outlines in OPML format.
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Simple Outliner is an outline processor which can be operated easily.
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Free online editor to create, edit, clean, manage, and merge OPML files easily. It's designed to help manage RSS/Atom feed lists on the fly, as a supplement to feed readers.
Feed Curator is an application that makes it easier to maintain OPML listings of blog feeds. You can add, change, and delete RSS feed entries with it.
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