If you want widgets, Avedesk (which also has a tabbed dock widget like objectdock plus), konfabulator/yahoo widgets, samurize, and there are things like sysstats which plugs into just about everything. Konfabulator has thousands of widgets and is the engine I prefer, eventhough I bought objectdesktop. I find both avedesk and knofabulator better than desktopX for widgets (stability and variety of widget choice). You might want to head over to deviantart and browse their categories as there are lots of free widget-type apps that I haven't even looked at yet. If you are looking for the total desktop replacement system but want to keep the MS shell then there isn't anything else like desktopX for that. But if thats what you want, I would recomend you take a peek at litestep or talisman, both free.