Some addons are standalone, and are able to run without any additional addons being installed; others can require certain other addons to be installed to work at all, or integrate with other addons to provide additional functionality. Collections of addons that have been put together to form a coherent user interface are sometimes referred to as UIs.
A lot of different types of addons are doing exactly the same thing. For example, Cross Realm Assist was an cross realm addon but in fact it is an LFG addon with its own UI. Serverhop and WQGF were doing exactly the same thing from program logic perspective. Even Badboy as a chat filter addon would filter LFG spamming. The idea behind BlockChinese could actually be used for premade groups as well. There is no point for people to install so many different addons for doing the exactly the same thing. These features should share the same code base and work together.
If you are looking for some solid information on fast leveling in wow and you want to plunk down the dollars, you should take a look at Zygor Guide. One of the first great features you notice is that this guide is available for both Alliance and Horde while other guides are horde or alliance only. That's why Zygor Guide sets itself apart from the crowd. The absolute best part of the guide is the map add-on. Once you have loaded up the mapmod, it makes it very easy to follow along with Zygor Guides in a step-by-step fashion. You won't need to press alt+tab aveytime you need to find your next step or coordinate. Everything is inside your game.
There is another way to uninstall Zygor Guides Free Trial in addition to the manual removal - advanced program uninstall tool, which is more popular and easier to handle for many computer users. And the highlight is that if you encounter some problems during the manually program removal, the professional uninstaller also can help you resolve the removing problem on your PC
Edit: the version from wow-curse seems to be a trial. To get the real one u have to download it from http://wow-pro.com/. Then u will not find un unzip or extract all option, but u get a link further on their page to a windows page that informs u of 2 ways to unzip. So i learned that u can also unzip by double clicking on the folder. For certainty i double clicked on every folder i could find, and then put the whole bunch into interface/addons in WoW. And it works ok now.