Next on the todo-list is to add a dynamic filter by severity/thread/location. Should be pretty easy to get going.
We used an in-application LogWindow before, but that sucks performance wise and it doesn't redraw when debugging the GUI-thread, obviously. This is also way easier than creating and managing an logging application as an entirely different process.
The most recent LibQxt even has a JSONRPCService, which might've been useful. We're using a slightly older one so I manually implemented a WebService which serves JSON or html/css/js.
Anyway, this ought to be cleaned up a bit and contributed back to LibQxt.