Not that Google makes them hard to find.. but I found these links to be useful: <ul> <li><a href="https://developers.google.com/+/" target="_blank">Google+ Platform (for developers)</a></li> </ul> <div>Downloads</div> <ul> <li><a href="http://code.google.com/p/google-api-php-client/" target="_blank">Google API client library for PHP</a></li> <li><a href="http://code.google.com/p/google-plus-php-starter/" target="_blank">Google+ API PHP Starter project</a></li> </ul> <div>I'll be experimenting with these over the next few days.. Maybe I'll decide to share what I learn.</div>