Some Function Libraries Addons:

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http://www.curse-gaming.com/mod.php?downid=97 -
CosmosSchedule
Description:
Delay Timer.
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http://www.curse-gaming.com/mod.php?downid=98 -
Dragons_Fire
Description:
GoldView addon's library.
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http://www.curse-gaming.com/mod.php?downid=426 -
DynamicData
Description:
DynamicData aims to be for dynamic data in WoW what Sea is for lua functions - a library with stuff that gets updated in a timely manner, without having to fuss with events yourself.
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http://www.curse-gaming.com/mod.php?downid=194 -
Gypsy_General
Description:
The standalone General UI Mods AddOn in a ZIP archive. This includes the GypsyMod lag meter and movable casting bar features, and much more.

General

* Our general options add-on adds a replacement lag meter docked to the right of the minimap. The lag meter can be turned on and off.
* Option to enable the casting bar frame capsule, allows you to move the cast bar wherever you like, and lock it in place.
* Option to reset the casting bar to it's default spot.
* Option to display quest levels in the Quest Log.
* Option to enable or disable quest text fade-in.
* Options to relocate the main game tooltip to either the top middle of the screen, or the cursor.
* Integration with the GypsyMod Shell options menu, or slash commands allow option configuring.
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http://www.curse-gaming.com/mod.php?downid=102 -
Gypsy_Shell
Description:
The GypsyMod Shell AddOn in a ZIP archive. This includes the GypsyMod menu which enables graphical configuration of all GypsyMod AddOns, and the GypsyMod capsule lock feature.

Shell

* Lastly is the GypsyMod Shell, our options menu and configuration system. This AddOn provides a nice graphical menu display for configuring all of the GypsyMod options. The options menu is accessible via a button positioned at the bottom of the minimap, or via key binding.
* The Shell also adds a lock all mechanism to GypsyMod. A lock button is positioned to the left of the options menu button around the minimap cluster, and will allow the player to lock the display of all GypsyMod capsules, effectively locking them in place and preventing the capsules from displaying when you hover over them. This function is also accessible from a key binding.
* The GypsyMod shell also adds a much needed Reload Interface key binding.
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http://www.curse-gaming.com/mod.php?downid=193 -
Hyperlink
Description:
What is an hyperlink ?
An hyperlink is a clickable text in the chat.
Example : When you click in the name of someone or in an object, you are using an hyperlink.

How to make your own ?
Look at the Example.lua, it will show you how to make your own clickable text.

It will print a message, and when you'll click on it, a message will pop.
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http://www.curse-gaming.com/mod.php?downid=451 -
PartyComm
Description:
PartyComm is general purpose AddOn created to allow other AddOn's to communicate between party members invisibly. Full documentation is included in the PartyComm.lua file. PartyComm was created to help keep channel clutter at a minimum as more client/server style AddOn's are created. Cosmos contains a nearly identical functionality via the ZParty channel, but of course, is limitted to Cosmos users. Because Cosmos has modified the base files in FrameXML, extracting ZParty for general use does not seem possible. I encourage any AddOn developers creating a client/server based AddOn for party members to look into using PartyComm. Feel free to redistribute PartyComm with your AddOn.

Slash Commands
All PartyComm commands can be accessed by typing /partycomm or /pc.
/partycomm on - enables PartyComm and joins the appropriate PartyComm channel. (on by default)
/partycomm off - disables PartyComm and leaves any PartyComm channles

Installation
Unzip into your World of Warcraft install directory.

Upcoming Features

* Movement of PartyComm channel to a higher number in the channel list.
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http://www.curse-gaming.com/mod.php?downid=103 -
Sea
Description:
Sea is a set of function libraries designed to make the process of writing new World of Warcraft UI mods faster and simpler. It is designed to reflect a Java like library style.

More details here : http://www.wowwiki.com/Sea
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http://www.curse-gaming.com/mod.php?downid=391 -
TargetLowestParty
Description:
The Target Lowest Party AddOn provides six script functions for use within macros to target the party member with the lowest health by percentage or by hit points as well as the existence of buffs/debuffs. See the web site for details on their use.
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