Guild Utility Tools

[Andorrabell]

Guild Roster Checker:

If you want to keep an eye on who is leveling, who is joining, and who is leaving your guild, this application works well (it also does pie charts of how many of each class you have etc. so if you run it hiding alts it can be good for that data as well)

http://www.deluclin.com/guildchecker/

Ventrilo Voice Software:
http://www.ventrilo.com/