Zeal is an offline API documentation browser. In this short note we are going to install Zeal under Ubuntu and Arch Linux.
Under Ubuntu you also need to install Qt5 SDK
sudo add-apt-repository ppa:ubuntu-sdk-team/ppa sudo add-apt-repository ppa:jerzy-kozera/zeal-ppa sudo apt-get update sudo apt-get install zeal
Under Arch Linux
yaourt -S zeal-git
After install go to Edit -> Options, choose Docsets tab, and click on Download button. Then you will see a list of available docsets for downloading.
That's all. Now you can search and browse different APIs offline.