Element 14 has added a real-time clock (RTC) board to its Raspberry Pi add-on line-up, and re-spun two I/O boards to make them compatible with Model B+ (40pin I/O) as well as Model B and A (26pin I/O) ...
Raspberry Pi enthusiasts may be interested in a new open source USB Raspberry Pi RTC offering a MCP2221 USB-I2C Converter, DS3231 High-Precision RTC Chip, TCXO, integrated temperature sensor as well ...