Syncman

Features:

• Three different synchronization strategies: Bi-directional sync between Address Book and Gmail, One-way synchronization from Address Book to Gmail, One-way synchronization from Gmail to Address Book.
• Support for most standard contact fields: Name, Company, Title, Notes, Email Addresses, Phone Numbers, IM Accounts (AIM, Jabber, MSN, ICQ & Yahoo)
• Scheduled synchronization with configurable 'bother level'.
• Can optionally run in the menubar as a background application (especially handy when using scheduled synchronization)
• Works with both Gmail and Google Apps.
• Shows you all proposed changes before it makes them.
• Optionally synchronize Gmail's "Suggested Contacts".

• Reworked how Syncman interacts with the Keychain. This will hopefully fix some password issues a few users were having. And in any case there is now proper error reporting instead of silently failing when writing to the Keychain fails.
• Updated automatic updates to be more reliable and secure, and made the automatic update check interval configurable (hourly, daily or weekly).
• Made the help menu more helpful, especially when running in the menubar.