here are another three
tropical fruits which were for sale at a market in Kuala Lumpur, and I
reckon the one on the left might be Canistel, Pouteria campechiana,
which is also known as egg fruit and yellow sapote. The one in the
middle is probably Cherimoya which is also known as Custard apple.
The fruit on the right is almost certainly langsat, Lansium domesticum.

I looked on the net and guessed the names from images which I found.
Please let me know if any of the (above) descriptions are incorrect.
C U on the email, keith 