Nicefoto K-series flashes have TTL, HSS and modular battery packs that can be stacked together. A Godox AD600 killer?
Rime Lite i.4 TTL, Falcon Eyes SATEL TWO S-2T and Visico-5 are all S-fit battery-powered studio flashes with TTL and HSS support.
Adorama's Orlit Rovelight RT-610 is a TTL/HSS battery monolight compatible with Canon's RT flash triggers.
Jinbei's latest studio light has TTL for Canon and Nikon, and LED modelling lamp and flash durations down to 1/22,000 second.
The Mcoplus MT-300 Flash Cube is an ultra-compact, powerful TTL studio flash that can run on AA batteries.
The Phottix Indra500LC is a 500J TTL studio flash compatible with the Canon ST-E3-RT and Phottix Laso flash triggers.