WinDirStat does a map-like view where blocks are grouped by folders. KFilelight only does sunburst I think, but I also have to say I like that, because it's ea

WinDirStat does a map-like view where blocks are grouped by folders. KFilelight only does sunburst I think, but I also have to say I like that, because it's easy to navigate (large click-able surface area).