Siege Workshop
Breeding Den
Leatherworkers x2
Silos x2
Tailor x2
Bakery x2
Bazaar x2
Farm x2
Cottage x2
Not a considerable amount, but enough to keep the $$ rolling in since I'm one of those guys who gets bored by scrolling through the battle list looking for 1 guy out of 100 to hit (could be checking my other games - or working - or reading - rather than spend my time doing that).
I do have 1,100 dragons now though... and finally broke the 200k Attack barrier last week (not bad for free player on level 130)! Wish I could get my Defense up more though... been mining the Shipwreck Cove for 6+ months and have improved my armor, but would like to see it go faster...