A few -
Colt .380 ACP Pocket Hammerless and Vest Pocket .25 ACP. I would not carry the .380 in a pocket but it was considered a "pocket" pistol in the old days:
Kahr P380:
Ruger LCP:
S&W Model 60 with bobbed hammer:
S&W 637-2, also with bobbed hammer, shown in OWB holster but easily fits in front pocket as well:
