Kwikkel

Kwikkel is an easy way to scan directly to Google Drive. Within Kwikkel you can create personal e-mail addresses, and when sending e-mail there, the attachments will be stored on your Google Drive. You can configure which attachments to keep or ignore, convert to Google Docs format and even apply OCR. Except for scanners, Kwikkel can be used as forwarding address for e-mail filters, e.g. to sort your incoming electronic invoices onto your Google Drive

Screenshots from Chrome Web Store