Wheelchair is a modern collapsible wheelchair, created by Ziggie.
There are two versions available on the download page. The version for P4/PPP is in the topmost row and leftmost column of the free items grid. The version for Poser 6 (which is also usable in Daz Studio) is in the topmost row and second-left column of the free items grid.
Free resources for Wheelchair (Ziggie) include: