fruux - Free service that takes care of your contacts, calendars and more so you don't have to.
doubleTwist - Music Player for the Internet of Things. Described as the iTunes for Android, doubleTwist brings you music, radio and podcasts everywhere. Free download.
FullContact - Put the power of full contact information into your web or mobile apps.
SyncMate - SyncMate is a Mac sync software which will sync Mac with Android, Nokia and Windows Mobile phones, iOS devices, other Macs, online accounts, etc.Android sync Mac - Devices - Free vs. Expert - SyncMate Customer Support .
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.
SyncMe - Copy, move, sync and backup your mp3, pictures and documents over WiFi, cellular VPN or wired...