The tinned spagheti in tomato sauce is free on green days, as are baked beans.
Many of the pasta n sauce range are free if made with water (cheese and brocolli is). Some have a few syns though (always best to check).
Then there are the savoury rice's in packets.
The heinz Spag bol (not just the tomato sauce) used to be but isnt any more.
Many of the ravioli's used to be free but I havent checked any for a while as im on cambridge now. Sorry I cant help with that one.
Sorry If you know about all of these but thought it wouldnt do any harm to mention them. x