Canon Canonet QL 17 GIII

Big name, tiny full-manual rangefinder with a workhorse 40mm 1.7 lens. I don't know why it never makes it onto the list of compacts, but it's about as small as a camera can get while retaining manual features.

Also, be prepared to pay between $10-$20 to have it refoamed, or do it yourself. The original foam in these is notoriously bad, but easily replaced.