"Rebus Community is a platform for creating and publishing open textbooks. We provide OER projects with publishing guidance, support forums, a Contributor Marketplace, and dedicated discussion spaces." This community includes project homepages where project leads and contributors can track progress, publicize news, and communicate needs. This is a great place to begin if you are new to managing open textbook creation.
"The LPC is an independent, community-led membership association of academic and research libraries and library consortia engaged in scholarly publishing."
"OER Commons offers a comprehensive infrastructure for curriculum experts and instructors at all levels to identify high-quality OER and collaborate around their adaptation, evaluation, and use to address the needs of teachers and learners."
"The MERLOT system provides access to curated online learning and support materials and content creation tools, led by an international community of educators, learners, and researchers."