| DigiCDCFast | USB CDC serial port for the Digispark (ATtiny85) and Digispark Pro, without the throughput limits and bugs of DigisparkCDC. |
| DigiCDCMulti | Two or three USB CDC serial ports (SerialUSB, SerialUSB1, SerialUSB2; /dev/ttyACM0 and up) from one Digispark (ATtiny85) or Digispark Pro. |