Workflowy lets you organise your brain into easily manageable lists. It also works as a single-pane outliner with inline notes. It offers one-click hoisting (zooming into branches). The online version syncs with mobile apps.
- - Workflowy is the most popular Web-based, Android, iPhone & iPad alternative to buzz.opml.
- - Workflowy is the most popular free alternative to buzz.opml.
You can keep notebooks stored in plain-text and have them synchronized with a directory on your mobile device, SD card, Dropbox, or over WebDAV.
- - Orgzly is the most popular Open Source alternative to buzz.opml.
Legend (formerly Moo.do) is a notepad, a to-do list, and an outliner, but with advanced features that make the cloud-based application much more useful than any of those tools would be on their own.
- - Legend is the most popular Linux & SaaS alternative to buzz.opml.
A professional list-making tool. Minimalist, keyboard-centric online outliner and task management application. Free sharing, unlimited lists, free import and export. Markdown and code support. Good for geeks 🤓 and keyboard lovers 💻.
OmniOutliner is a start-to-finish writing app. Perfect for collecting information, outlining Big Ideas, adding structure to any sort of writing, and much more. From grocery lists to email drafts to long-form composition.
- - OmniOutliner is the most popular Mac alternative to buzz.opml.
- - OmniOutliner is the most popular commercial alternative to buzz.opml.
TreeLine just stores almost any kind of information. A tree structure makes it easy to keep things organized. And each node in the tree can contain several fields, forming a mini-database. The output format for each node can be defined, and the output can be shown on the screen...
- - TreeLine is the most popular Windows alternative to buzz.opml.
Zavala is a modern take on a traditional outliner. It supports all the things you want in a Mac app like multiple windows, keyboard shortcuts, a customizable toolbar, and a full menu bar.
Visual Outliner is an outliner software for Windows, and it uses OPML as native file format. It's not just another tasklist application, but a real outliner editor that can be used to write, view, modify, and maintain hierarchically arranged text.
Visual Outliner Features
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...
Natara Bonsai FeaturesDiscontinued
Official site inaccessible, but app still available on download sites.
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.
Cloud Outliner Features
Dashword is by far the most convenient and user-friendly tool for creating any semantic network, be it your business idea, an abstract of a lecture on computer science, a script for a movie or a recipe for your favorite dish.
Tkoutline is a single pane, cross-platform outline editor written in Tcl/Tk . With this editor, information can be structured hierarchically in an outline and outlines can be hyperlinked together to create a web of outlines.