Why pay for other products that do the same thing, I did only to find they were free and being resold anyway. So here is the easiest free group inviter.
The Free Simple Group Inviter allows people to join your group when touching a sign.
Most probably the easiest Group Inviter available. Just set your sign to your group, make sure your group is set to open enrollment and drag the script to the contents of your sign.
EASY
EASY
EASY
No need to find or add group UUID's
Get your free copy from the links below.
Inworld;
http://slurl.com/secondlife/Cassidy/160/192/33/
Slexchange
http://www.slexchange.com/modules.php?name=Marketplace&file=item&ItemID=631068
This script has also been added to the Scripting Library.