Explore a 44-minute conference talk on "Flohmarkt," a decentralized federated classified ad platform. Discover how this ActivityPub-based prototype aims to promote reuse, neighborhood assistance, and community engagement. Learn about the development process over the past six months, including insights into the ActivityPub ecosystem, reverse-engineering Mastodon, and the potential for creating localized ad platforms. Watch a live demonstration and consider the possibility of becoming an admin for a neighborhood classifieds platform. Gain valuable knowledge about decentralized technologies and their applications in fostering community connections.