Listography - Create your lists, preserve your story, and stay inspired.
Workflowy - A better way to organize your mind.
Listly Chrome Extension - Convert webpages into Excel data in seconds
Orgzly - Outliner for notes, tasks and to-dos
BucketList.net - Bucket list ideas, advice and support
UV Outliner - UV Outliner is a small and powerful single-pane outliner.