NOTE: I no longer have an active WoW account as of 4/1/2007, so as of now these addons are not being udpated.

Here are the addons I've developed for World of Warcraft, no GUI stuff really, but helpful in other ways.

• Incognito
  Adds your main characters name when you type in 'Guild' chat so people can keep track of who's alt is who...
  
  Looks like: AlternateToon: (MainToon): hey guys it's my alt
  
  /incognito - help
  /incognito YourMain
  /incognito off - turn off
  /incognito on - turn on
  /inc command also works.
  
  
• Auto Accept
  Automatically accepts invites to partys and raids. You know you want to go eat dinner or grab a snack but your waiting on that raid invite. /aa for help
  
  
• Dismounter
  NOTE: This is now built into WoW by default. You can disable it in WoW with /console autoDismount 0
  
  Dismounts you when you try to do something on your mount like cast a spell or gather herbs. Great in PvP since you can start spamming the spell and it will auto dismount you (yes I know there are other's that do it better, but I made this one :P) /dm for help.
  
  The following addons do not work with 2.0
  
  
• Raid Copy
  Specific to my guild but others may find it useful. Basically makes a list of your current raid that you can copy and paste. We use it with our DKP tool that tracks which users are in the current Raid. Your mileage may vary. /raidcopy
  
  
• Bid Safely
  Bid Safely prevents the user from bidding over a speficied amount (default = 1g) without a warning dialog. This is to help prevent unscrupulous auctioneers from creating auctions with the idea of getting unwary people to bid on items that are obviously way overpriced. Use at your own risk! 
  
  /bids - current settings
  /bids help - help
  /bids #G #S #C - set the amount you wish to be the max bid with the following format: Where # is the amount of that type of coin.. 1g 50s would be = 1 gold 50 silver as the max bet before getting warning.
  
  This only changes the behavior of bids not buyouts.. buyouts already have a warning, if you miss it your going to miss this as well.