WorkFlowy.com – If you have a crazy job or an ambitious project, we will be your trusty sidekick. A simpler way to stay organized.
Dynalist.io – lets you organize your ideas and tasks in simple lists. It’s powerful, yet easy to use.
OmniOutliner for Mac – a flexible, svelte, and focused app for creating, collecting, and organizing information and ideas. OmniOutliner Essentials is simple—everything you need to get started. Pro adds powerful features like smart columns, password protection, keyboard shortcuts, and plenty more.
Org mode for Emacs – for keeping notes, maintaining TODO lists, planning projects, and authoring documents with a fast and effective plain-text system.
Checkvist.com – Professional list making tool. Use it to manage task lists, professional checklists, organize research notes. Work in teams. Generous free plan.
Outline – your digital notebook for iPad and Mac. A powerful, full featured note-taker for iPad and Mac OS X, perfect for students, teachers, physicians, lawyers, executives and everyone who needs to sketch ideas, organize notes, annotate documents, keep any kind of journals.
TreeLine – Some would call TreeLine an Outliner, others would call it a PIM. Basically, it 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,... [Read the full review]
MyInfo – Personal Information Manager That Frees You. A free form personal information manager (PIM) software for Windows. It is easy to use, but has all the benefits of a powerful organizer.
TheOutlinerOfGiants.com – A feature rich Outline Processor for students, researchers, writers, and project managers.