Mods with  tag will work only with 2009 version of CitiesXL; probably some  mod will work too, but it has not been tested. So download it at your own risk. Mods with  tag will work only with 2011 version of CitiesXL and many old  mods can be used too (like add-ons); however, since they use old code, you may get errors or missing features while playing.
Please read descriptions written by authors to know more about the mod.
Last update: 11/07/2011 - Sorry, some links won't work. I'll update them once CXL exchange at Simtropolis will be back online. Thanks