The first one is terribly familiar :( Lychee perhaps?
Is that red new growth on the second - Lillypilly? or perhaps the bigger leafed Jaboticaba.
No idea what the third might be.
Try posting your pics on the Daley forum too Shirley, they can be pretty helpful when it comes to fruit trees.
First one is a Wampi - almost 100% sure :)
Thanks Lissa, I think the first is a Wampi too, yes the new growth on the second on is red, it's not a lillypilly. I will try posting on the Daley forum, great idea. Thanks.
These are two photos of the other tree, I agree with Lissa the first one rings a bell as being a Wampee. Thanks so much. The one above, I have a suspicion that it could be a star apple, however the descriptions I have found on the net suggest that the underside of the leaves should be dark or bronze!!!
Didn't realise this about star apple fruit:
Star apples must not be bitten into. The skin and rind (constituting approximately 33% of the total) are inedible. When opening a star apple, one should not allow any of the bitter latex of the skin to contact the edible flesh. The ripe fruit, preferably chilled, may be merely cut in half and the flesh spooned out, leaving the seed cells and core.
You could also try asking BOGI, ROGI and Australian Tropical Fruits.