Dash comes with 80+ offline documentation sets. You can choose which documentation sets to download and Dash will take care of the rest, making sure they are kept up to date. Apart from these, you can generate your own docsets, request docsets or download documentation sets from CocoaDocs.
Listed below are all the various documentation sets Dash comes with. The most popular ones are highlighted. All documentation sets have been generated and are maintained with the utmost care.