The version for Windows is a dead project. He is in the process of making a Mac version, though.
But the last Windows version is still available if you email this guy
and ask him for it.
As far as keeping all their stuff and forcing it to remain available, the rights to the projects are owned by their creators. At no point did any of the developers transfer those rights to DonationCoder. They can do what they want with those projects, including kill them and make them unavailable....it is their right.
I think it is unfortunate when it happens, but we don't have the right to force anybody to keep their work available if they don't want to.
Maybe you can send Smirf a private message expressing your interests in his application and ask him to please consider attaching the last version of it to its associated post on this forum. He seemed like a nice guy and I don't think it would be unreasonable to ask him this.
You might also be able to get in touch with him through his blog
. (German language only) Or by leaving a comment on this post