Nature Scitable

As of 2022 visible at: www.nature.com/scitable

Apparently they had a separate URL as just scitable.com, so they were somewhat serious about it before shutting it down.

As of 2022 marked:

This page has been archived and is no longer updated

RIP.

www.nature.com/scitable/blog/student-voices/ has last entry 2015, so presumably that's the shutdown year.

Self description:

Using our platform, you can customize your own eBooks for your students. Create an online classroom. Contribute and share content and connect with networks of colleagues.

so quite related to OurBigBook.com.