Yes, for standard form factor, non-proprietary boards. Power wise, they have right type and number of connectors. The seller seems to be selling more than one configuration from batch to batch though, so its possible that you'd need extensions for the power cables depending on the board you use.
They will fit standard form factor boards up through EATX. EE-ATX will also work if you don't have the rear drive bay installed. Proprietary form factors are probably hit and miss, and you'd probably loose some functionality. For example, WIO form factor boards (like X11SSW-F & etc.) will fit in this chassis, but you won't be able to use the PCIE slots because they won't line up with the rear window openings.