Westcott FJ80-SE - universal speedlight, works withCanon, Nikon, Sony (manual mode), Fuji, Panasonic/Lumix, and Olympus.
PHOTOOLEX Speedlite FK310 Manual Hot Shoe Mount Universal Camera Flash Unit
Gloxy GX-F328 Universal Camera Flash Speedlite for Nikon Canon Sony Boxed Manual
Universal Camera Mount C Clamp with 1/4 3/8 Screw Holes Multi-Function Desktop
GODOX TT520 III Universal Camera Flash Speedlite,with Wireless Trigger GN33
Godox TT520III Universal Camera Flash Speedlite with RT Trigger + S2 Bracket
GODOX TT520 III Universal Camera Flash Speedlite,with Wireless Trigger GN33 433MHz Wirekess Receiver,S1/S2 Modes,8 Power Levels, Compatible with Canon Nikon Pentax Olympus Fujifilm Panasonic Cameras
