brightbean-studio

Open-source, self-hostable social media management platform. Schedule, publish, and manage content across 10+ platforms from a single dashboard. Free alternative to Buffer, Sendible, and SocialPilot. Maintained by brightbeanxyz on GitHub, where it has earned 2,034 stars from the community.

It's actively developed around agpl, buffer-alternative, content-management, and is a solid reference for anyone building with these tools.