While not an onscreen widget its the same general idea as most of the ones listed::
more /commands and ctrl+commands.

So far the only useful /command I've found is /friendlist or /flist, which brings up your friendlist, and the ctrl commands are only used for changing your chat mode and using macros. I'd like stuff like ctrl+e brings up your Equipment, ctrl+a brings up the Actions&traits, ctrl+i brings up Inventory and other similar menu shortcuts
Since this game doesn't have a search function at the moment I can't think of any /commands off the top of my head as /search(/sea) is the only one that comes to mind but if someone has one feel free to mention it.