Currently Start8, Decor8, Fences 2, Multiplicity 2, Tiles, IconPackager, IconDeveloper ,and WindowFX 5 are designed to work with Windows 8.
WindowBlinds and DeskScapes should be ready in early 2013.
Other applications may or may not work. At this time though, they are not supported.
We are updating more of our software as time goes on so keep an eye on our forums for more details.
Please let me know if you have any further questions/concerns.