- nullsoft nifty dot, very old, no basic playback controls
- mikroamp, up to date, skinable, moveable on the desktop, shows playback controls when rightclicked
I don't think that one of those is the plugin you are looking for, but they do similar things.
do you remember the name, or parts of the name of that plugin or even better the filename (eg. gen_corner.dll)?
this would help to find it.