Steve Hays has written far too much about the afterlife for me to link more than a small portion of his material here. Many of the fictional stories he's written have been about Heaven or Hell. See his blog that features his fictional work, for example.
He's written many posts, like this one, about the difference our beliefs about the afterlife make in the lives of believers and unbelievers.
Here's a post Steve wrote about some of the Biblical images of Heaven.
And here he wrote about Heaven surpassing what we can imagine.
He also wrote about the experience of glorification.
Here's a post he wrote about marriage in the afterlife.
He's also written about whether there will be sex in Heaven.
On the issue of whether more people throughout history will be lost than saved, see here.
Regarding infant salvation, see my post here and Steve's here.
Steve has written about rewards in the afterlife.
He's written many posts on universalism. For example: here, here, here, here, here, here, and here.
On annihilationism, see here and here.
I've written about Limbo and Purgatory.
Here's a post Steve wrote about distinguishing between common portrayals of Hell and what the Bible actually teaches about it. I wrote a post of a similar nature, and that post links to a previous thread in which a few of us on the Triablogue staff commented on the subject.
Steve wrote a post about the potential role of subjective factors in making Hell what it is for an individual.
Paul Manata wrote a post about the alleged immorality of Hell if compatibilism is true.
Here's an article I wrote about how the early patristic Christians viewed Hell.
Here's a post by Steve on soul sleep.
Concerning near-death experiences, see here and here.
On animals in the afterlife, including pets, see here and here.