Aleri is a simple guild addon that shows addition info about players.
Either use the minimap button or the slash command /aleri -ui to open/close the interface.
Summary tab: This shows a general summary of the guild.
Roster tab: This is similar to the default guild roster UI but shows additional information based on what other guild members share via the addon.
Profession tab: coming soon
Profile tab: This is your character, it should automatically collect information about your character. The drop down menus allow you to set your main/off spec and you can input the name of your main character if this is an alt. Once updated click confirm to share the data with other online guild members.
All members that use Aleri will be able to share their data.