As globally distributed software development has become generalized, social coding platforms like Github are becoming increasing needed for team collaboration. To share and help understand the overview of projects among teams, source code visualization is useful. In this paper, we present a new visual software development tool, Rocat, a city-like software code visualization in virtual reality. In addition, we integrate Rocat with a GitLabbased code hosting service, Kataribe. By integrating Rocat into Kataribe, fine-grained code information can be visualized, and city visualization can be easily shared. We present our tool and provide the features of Rocat on Kataribe. A Screencast for demonstration is available at the following URL.