I tried out BumpTop a few years ago, but don't remember being overly impressed. I recall comments that it was buggy and a resource hog. Just reinstalled it from your linked file, and finding it fun, and possibly even useful. There were some external widgets made for BumpTop, many looked useful - such as a file preview widget to browse content without opening the file. I've looked around for these widgets on Google, and also the widget manager previously available - to no avail. All links seem to be dead.
Anybody know where to download BumpTop external widgets?