PalPark - Curate and share your learnings by topics

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

Golden - Mapping all human knowledge

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

LearnAwesome - Humanity's universal learning map

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.