ContactSync is an Android app which allows it to sync your Android contacts with local files (stored on your device or e.g. mail attachments) and FTP, HTTP, WebDAV or CardDAV servers. There are also a lot of additional features available. All this can also be done independent from the Google services. A list of all the features is available at the manual.
If you like my a app and you want to support me for further development feel free to:
Thank you! :)
If you experience any problems you can contact me with an mail (consync[at]gmx.at) or at the support thread.
Support Thread (XDA DEV):Click me
You can use the following version if you want to check out the app for free: Contact Sync Free Evaluation Version 6.2
There are also some additional Android Apps available here which probably are interesting for you.
Is designed to sync the appointments on your Android device: CalendarSync
Is designed to sync the tasks on your Android device: TaskSync
If you want to test features which require a license (e.g. syncing with network sources) you can use the free test version available here or at the Google Play store. Using this way you can check out all the features of the app without any limitations! You also can buy a full license. The app is also available at the Google Market/Play Store but google takes 30% of every transaction therefore it is cheaper for you to by the license from me directly. For more informations contact me at consync[at]gmx.at.