The CrunchBase PHP library by Juancho Rossi explains how to use this resource with a few lines of code. Considering the implementation of applications working in PHP language, developers can access organizations, people, and products, the 3 main items in the CrunchBase dataset. Documentation available at https://developer.crunchbase.com/docs
Folks interested in "open knowledge" should check out CKAN (Comprehensive Knowledge Archive Network)
CKAN is the Comprehensive Knowledge Archive Network, a registry of open knowledge packages and projects (and a few closed ones).