Apple ExpressCard Update 1.0 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. The program lies within System Tools, more precisely General.
From the developer:
ExpressCard Update resolves an issue that prevented the system from sleeping when some cards are inserted in the ExpressCard/34 slot.
Device Assistants
Network Tools