I think this was previously called DataSlider. To get it, just close Revit and Vasari and open your Case Add-in Manager (it may want to update itself). Then tick the Migrate Parameter to Parameter box and Install/Update checked.
From their website:
CASE APPS Migrate Parameter
Have you ever needed to schedule an item of data that Revit would not let you? This is a common hurdle for many and now there’s a free tool that you can use to get around this. Common uses include migrating Wall Base Constraint Element Names (Levels) into a schedulable parameter. I’m sure you guys will find lots of uses for this one.
David hinted at this a little while back:
Revit: Can’t schedule wall constraint – part 2