Guildbook Classic Era.
This is the original Guildbook updated and improved but keeping the old UI. Its been worked on specifically for the Classic Era realms.
*Guild Tree - this is a fancy view of the guild showing members in rank order, easy to see the leadership structure!
*Tradeskills - view items by profession, reagents required and who has the recipe
*Guild Roster - this is a more detailed view of the guild with information such as specialization, professions, location etc
*Calendar - not fully implemented yet
*Guild Bank - view items in your bank alts
*Profiles - view detailed information about a guild member such as equipment, talents, alts and skills.
More features to be added in the near future. (slight caveat that I'm partially waiting to see what Blizzard introduce later this year)