So I fired up Steam today and lo and behold, what's under the new release section?
If you've ever read the GameFromScratch list of 3D Applications you will see I am a fan of Silo. It's mostly a 3D modeller, its very good and previously used to be 200$. Now a gigantic word of warning, Silo has been pretty much abandoned, with no new updates for years. This is unfortunate, because it was a great product at a great price. Even abandoned, for 50$ it's still awfully tempting, if you want a modeller on the cheap… it's a lot like Modo with a fraction of the price tag.
Maybe the Steam sale will encourage them to put some more effort into developing Silo again.
If you are interested, there is a 30 day trial available.