Joomla - X-Cart connector, so x-cart scripts can
see/use Joomla code/data and vice versa (it is possible to get access to x-cart data from Joomla scripts).
Full accounts management synchronisation. So an account created/deleted/modified in one system gets created/deleted/modified in another one. Those changes
can be performed by an end user or by x-cart/Joomla admin.