FriendsShare Resurrection is an AddOn that lets you keep the same friends list across characters, on a per server basis. If you add or remove someone from your friends list and relog to an alt, that person will be added/removed from the alts friends list as well. Also, any entries on that alts list which isn't in the global list, will be added to the other characters whenever you log them in. Basically, you never have to manually rebuild your friends list when creating alts, or worry about keeping them current on all your alts.
Global Ignore List
Group Calendar 5
Group Calendar 5 features: Compatible with the built-in calendar and web-based armory calendars; View and edit events using local or server dates and times; Track tradeskill cooldowns; Create partnerships for coordinating events across multiple guilds; Reminders for upcoming events and tradeskill cooldowns; View events and get reminders while on your alts; Easy invite management to track group composition; Quickly invite players to the raid from the attendance list; Export your calendar to the iCalendar format for use in external applications or web calendars; Set level limits and duration for events; Analog clock with date on the minimap button for attractive timekeeping.
This addon keeps track of any changes in your guild roster, and also reports changes that happened while you were offline. It plugs into any DataBroker display addon (like ChocolateBar, Bazooka or TitanPanel) to present the list of detected changes.