Better Notes - Simple notes app that ties notes together with #hashtags

Corpus - Curate, take notes and share your reading list

Paper - Super-clean writing space with a lot of configurability that stays out of sight when you don’t need it.

Short - The reading list for busy people

Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.

Readonomy - Shared reading list and bookmarks for teams.