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.
Dual Supply for Raspberry Pi
Power your Raspberry Pi from multiple sources (PSU, Power bank, etc.) with load sharing
Turns your Raspberry Pi Zero (all versions) into a USB dongle with no soldering
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)
Micro USB Dual Supply
Dual Ideal Diode. Power devices from multiple sources with load sharing
MMC (SD) HAT
Add a second MMC/SD interface to your Raspberry Pi (Disables WiFi on 3B/3B+ due to them both using the second SDIO interface. Can be used as a Micro SD card reader/writer, additional storage, RAID1/RAID0 root partition)
HAT Compliant EEPROM for the Raspberry Pi which can be used to develop HAT, configure your GPIO/load device tree on boot
USB Serial Adaptor
FTDI 3.3v UART to USB Adapter
USB Power Splitter
Power two devices from a single micro USB supply (does not split USB data signals).
USB Power Switch
Control power to a USB device (on/off) using a switch, or GPIO from a Raspberry Pi, Arduino, etc. (Available in Normally On and Normally Off)