If you are talking about company's internal developer facing documentations, they are not going to be on internet. Some of the best product documentations ther

If you are talking about company's internal developer facing documentations, they are not going to be on internet. Some of the best product documentations there are: https://stripe.com/docs/api https://stripe.com/docs/api http://www.twilio.com/docs http://www.twilio.com/docs https://docs.djangoproject.com https://docs.djangoproject.com https://developers.google.com/maps/documentation/ https://developers.google.com/maps/documentation/ http://docs.oracle.com/javase/7/docs/api/ http://docs.oracle.com/javase/7/docs/api/ https://parse.com/docs/ios/guide https://parse.com/docs/ios/guide