Raj from embedded-lab informed me about his latest project. He made a multi-function power supply for his workbench, with current, voltage and frequency measuring capabilities. He does a lot of prototyping, during which he had to connect external voltage and current meters. But now with his cool PSU, he can always monitor the power. The circuit is based on the PIC 16F689 microcontroller from Microchip. You can find all the details in this link.