Amazon.com : Pixel e-TTL Flash Hot Shoe Adapter with Extra PC Sync Port for Canon DSLRs and Flashguns : Flash Shoe Mounts : Electronics
Flash Cold Shoe Mount Adapter to 1/4 Thread Hole with 1/4"-20 Male to 1/4"-20 Male Tripod Screw Adapter
Amazon.com : Pixel e-TTL Flash Hot Shoe Adapter with Extra PC Sync Port for Canon DSLRs and Flashguns : Flash Shoe Mounts : Electronics
Camera Metal Flash Hot Shoe Mount Adapter to 1/4" Screw Thread Tripod – SIOTI
3.5in Drive Bay IDE to CF Adapter Card - Internal Card Readers | StarTech.com
micro SD card to SPI flash adapter from Bobricius on Tindie
micro SD card to SPI flash adapter from Bobricius on Tindie
Amazon.com : Optical Flash Slave Trigger JJC Hot Shoe Sync Adapter with PC Socket,Optical Sensor & 1/4"-20 Threaded Socket Cold Shoe for All Flashes Speedlight with Standard ISO 518 Hot Shoe-1 Pack :
PCMCIA - CompactFlash - PCMCIA type II - Drive Adapters and Drive Converters | StarTech.com