Gator, also known as Big Gator, is a friendly little program, which, when installed, informs you, with a pleasing pop-up window, that you are visiting the wrong site and shows you how to get to the correct one. It's popularity peaked amongst web surfers in the early nineties where people would do anything to install it on their computers. A side effect of installing Gator is its ability to enter your user name and password into the sites you visit most frequently. The world rewarded the creators of this marvelous program by making them filthy rich. Gator is one of the greatest programs ever made for your broswer.
It was very hard to install, hence the development of "Gator-Aid".
The history of Gator can be traced to the trojan war. When the Greeks invaded Troy, they first attempted to sneak past the Trojans in a large wooden alligator. The subsequent bad PR that resulted when said alligator erupted into a flurry of Greek soldiers led the Greeks to later rebrand their distribution model under the guise of a much friendlier-looking horse. The resulting slaughter was much the same, but had a much better marketing campaign. Years later Gator followed the same pattern, only replacing the large wooden animals with spyware, and the murderous Greek soldiers with pop-up ads. The Greek implementation is arguably less irritating.
See also: Claria