Amazon.com : Pixel e-TTL Flash Hot Shoe Adapter with Extra PC Sync Port for Canon DSLRs and Flashguns : Flash Shoe Mounts : Electronics
USB 3.0 Card Reader, TSV TF Card/SD Memory Reader Adapter Supports SD/Micro SD/SDHC/SDXC/MMC, Mini Camera Flash Reader Compatible with Windows, Mac, Linux - Walmart.com
Flash Memory Adapter for some Game Boy Cartridges from J.Rodrigo on Tindie
USB Type C to USB 3.0 Adapters (2 pack) | Kanguru Solutions
SMDV Hotshoe Adapter - Hotshoe to PC Sync Adapter – Fotodiox, Inc. USA
Flash Hot Shoe Adapter Compatible with Sony – Foto&Tech
FlashZebra.com: PC to Flash Hotshoe Adapter (Item #0065)
Godox Four Speedlite Adapter S-FA B&H Photo Video
Amazon.com : Pixel e-TTL Flash Hot Shoe Adapter with Extra PC Sync Port for Canon DSLRs and Flashguns : Flash Shoe Mounts : Electronics
USB SD Card Reader, TSV USB 3.0 Type C OTG Adapter Memory Card Reader for SD/Micro SD/TF/SDXC/SDHC/MMC/RS-MMC/Microsdhc/Microsdxc, Camera Flash Card Reader Support Windows, Linux, Mac OS, Android - Walmart.com
AS-10 TTL Multi-Flash Adapter | Nikon
Godox Adapter Ring Kit for MF12 Macro Flash | Store Godox.eu
Pixel Flash Hot shoe Adapter for Sony Alpha A900 A850 A750 A700 A550 A500 A380 A350 A330 A300 as FS-1100
Polaroid Flash adapter / Flashbar alternative for SX-70 and other Polaroid cameras | realfilmreel
NEEWER 2 Pack Flash Hot Shoe Mount Adapter to 1/4” Thread Hole – neewer.com