Not really test equipment but not sure where to put this.
I just bought a little 3 digit panel voltmeter from ebay, cost was 2.12$ with shipping included. It's a great little module useful when building supplies or just to have one inside your car/motorcycle.
Although it has 3 leads, you can short the blue (sense) and red (power) leads together and use it as a normal 2-lead panel voltmeter.
Lowest supply voltage is 3.7V, it can take at least as high as 16V. I see no brightness change with supply voltage change and no flicker.
It autoranges at the 10V mark so you only get one decimal resolution above 10V. Autorange time seems to be about the same as refresh rate, 5/s.
Claimed accuracy is 0.1%, I haven't tested it but sounds a bit too good. Claimed input impedance is 100k, I haven't tested the input current.
Interestingly enough, the PCB has two pads labeled TX and RX, I haven't looked into those but it would be nice to be able to read back voltage.