My addons webpage for my cooperative server has been discontinued. So I had to redirected to another webpage. Presently, there are two addons on this new webpage: UDtoD2share and AlchemyWads. From time to time, I would use these addons for my cooperative server. Most other addons I would use would be downloaded from Doomseeker (Wadseeker) when I use the Zandronum port as well. So if you see a wad or pk3 that is not listed on the new webpage, it is most likely downloaded from Doomseeker. Try that feature.
Here's the link of the new webpage: