Small 6-pin AVR-ISP programmer using the FTDI FT234X and supported by Avrdude with a small addition to arvdude.conf. Can be used to program AVR IC and AVR based Arduino/clone bootloaders using the 6-pin SPI header.
Enables the Raspberry Pi to be used with two HAT/pHAT at the same time.
HAT For the Raspberry Pi - USB Gadget Mode network (+serial) in a compact HAT.
Camera Cable Joiner/Extender
Joins multiple Raspberry Pi camera cables together to extend the cable length (especially useful for the Pi Zero)
USB Serial Adapter (Pi Zero)
Solderless USB to Serial adapter for the Raspberry Pi Zero (for bare GPIO)
Can be used as a Micro SD card reader/writer, additional storage, RAID1/RAID0 root partition