Search and Browse API documentation with Devhelp Developer Tool
Devhelp is a free and open source API documentation application for Linux. Using this you can navigate through libraries and to search by function, struct, or macro. You don’t need active internet connection to use Devhelp. All are installed locally for offline use. It works with GTK-Doc well and you can integrate it with other applications such as Glade, Builder or Anjuta, and plugins are available for text editors like gedit, Vim, Emacs, Geany and more.