There seem to be add ons available for Alibre. I see references to existing and developing add ons in the general discussion but I am not sure of how to find them. Is there a common file section where these programs are available? Also is there a description of what they do? A name in the general discussion forum does not tell much about what the program is capable of doing. Also how do you tell if the program will work on the various levels of Alibre?