SeriousEats has an article about the jackfruit, "the largest tree born fruit known to man." The jackfruit is said to be not only large but odoriferous -- though not as smelly as the durian.
Finally, SeriousEats also gives us a post on pulasans and rambutans. These red, spiky, hair fruits look a lot like toys my kids throw at each other. Said to be protected by vicious fire ants, fruit lovers think they're worth the effort.