Google Drive - Access and sync your files anywhere
FullContact Card Reader - Automagically scan biz cards into LinkedIn/Gmail contacts
Dropbox - Online Sync and File Sharing
Truecaller - Find a person by a name or phone number worldwide for free using Truecaller.
ShareFile - Secure file sharing and sync
Google Contacts - Google Contacts is Google's contact management tool that is available in its free email service Gmail, as a standalone service, and as a part of Google's business-oriented suite of web apps Google Apps.