Pinboard is a social bookmarking site offering personal management of bookmarks by using tags to organize them.
Type of organisation: Privately-owned company (or group)
Market share: One of the leading products (#3-7)
Factors driving pricing: Additional features
Skills needed to set-up: Plug & play (any non-technical user can do it)
Skills needed to use: Plug & play (any non-technical user can do it)
Requires audience sign-in to use: No, sign-in is optional