Upvise provides integration with the following Google Apps:
Native Import and Export between Upvise and Google Contacts on Android.
View Upvise Calendar in Google Calendar via iCal.
Google Drive integration: https://upvise.wordpress.com/2012/11/09/google-drive-integration-with-upvise/
You can also send emails through Gmail from Upvise Contacts and store received emails using our Dropbox service: