http://simviation.com/downloads.htmlThere are a few a picked up from Google...

A lot of those require becoming a member but SimV's download center is totally free.

* Some addons may not be fully compatible with FSX.
(Apologies to Wil - but the list has been "mod-modified" by an over-eager mod/admin - Of course the BEST site in the universe for FSX free add-ons is Simviation.com!)
Felix/FFDS
