Pipinstrasse is software to implement a social network for groups, families, or neighborhoods. It features user accounts and profile pages, photo galleries with automatic scaling, a pinboard, private messages, chat, invitations to email addresses, guest access to selected photo galleries, and a start page with "wall" and "like" buttons. Typical use cases are private Web sites for neighborhoods, families, or clubs, where members want to communicate, but no public facing Web site is needed. Use generally is for members only. New users can register through a Web form, but need to be activated by an administrator. However, there is a guest facility, which gives invited guests access to selected photo galleries. Graphic design is done through themes, which are separated in their own directories.