The Awesome Greeter. Why is this Greeter awesome? Well. It is full perm. But it also has a lot of features other greeters do not have. It gets a list of everyone in the region and if there are new people in the list then it greets them. But not like other greeters do. It greets each individual person by getting their Key and using the special function called llRegionSayTo(). This creates way less lag in the simulator, as the script only speaks to ONE person and doesn't llRegionSay for the entire sim to hear. Normally people use llRegionSay, instead of llRegionSayTo, which is a lot more laggy. Another reason it's so great, is it plays a nifty little alert, and it updates the list every 5 seconds. If someone leaves it removes their name from the people-that-are-here list within 5 seconds. Then it will greet them again when they come back with a nice pleasant tone. It's at cyberdatastorm.com:8002:Wizardry. Once you set it down and leave it alone, you can make it invisible or tiny or stick the script & the sound in some other statue or something.
Many greeters use laggy llSensorRepeat() function with a short range. But really don't you want someone to be greeted whether they tp into the middle of your grid, or on some far corner?