Similar to ミュートピアプロジェクト

International Music Score Library Project

Werner Icking Music Archive

Choral Public Domain Library

Musopen

List of digital library projects

DBLP

International Image Interoperability Framework

Aozora Bunko

ArXiv

Wikibooks

ChemRxiv

Electronic Text Corpus of Sumerian Literature

Chinese Text Project

Digital Preservation Coalition

BioRxiv

Project Muse

Project Gutenberg

Perseus Digital Library

Making of America

Project 985

Double First-Class Construction

Project 211

Gitea

Gitee

GitLab

Wikipedia

Wikivoyage

WiLL