While not the first, the FNIRSI LCR-ST1 are affordable, and [TheHWcave] puts them to the test in the video below. The tweezers come with two different pointy ends. It is more or less one of those ...

For example, you can insert a resistor, a capacitor, an inductor, a diode, or a transistor and get a readout of which pin is which. It seems like magic, but [Andreas Spiess] did the research on ...