I am a representative of Aspose.Cells team and would like to reply regarding Aspose.Cells support on Windows 8.
Well, apparently there should not be any problem using Aspose.Cells on Windows 8 as the product is a pure .NET product (written in managed C#) and can work on any Microsoft Windows operating system. But, we have not conducted full tests on Windows 8 yet. A ticket is already logged with an id “CELLSNET-41242” for the case into our database. We will do it soon and let you know our results. But, I think Aspose.Cells should work fine on Windows 8 as long as your .NET framework version is v4.0 or prior (3.x, 2.x, 1.x etc.), but regarding .NET framework version v4.5, I suspect we might encounter a little issue/problem as there is no more support of ArrayList in it. Anyways, until we perform the tests thoroughly, we cannot say with our confirmations.
Once we have any update on it, we will let you know here.