Google Contacts, like most of their products, keeps changing and getting worse. Somewhere along the way it deleted all of the street address information from my contacts!

Ideally looking for a tool that checks these boxes:

• Open-source
• Android, Web, and (if necessary) Linux and Windows clients
• Stores contact info locally (i.e. self-hosted)
• Stores contact info securely (encrypted)
• Can store in a cloud location (e.g. Sync, Dropbox)

It seems like a tall order, but KeePass has managed to do that with their password vault, so why not contact info?

Any success stories out there?