Holdings include images and descriptive data relating to works of art produced between early apostolic times and the sixteenth century. Although the Index of Medieval Art was formerly known as the Index of Christian Art, the collection now includes secular subjects as well as a growing number of subjects from medieval Jewish and Islamic culture. About half of the total records held in the Index are currently online; back-files and new material are added regularly.
The International Music Score Library Project (IMSLP) is a project for the creation of a virtual library of music scores and recordings. The library consists mainly of scans of old musical editions out of copyright. In addition, it admits scores by contemporary composers who wish to share their music with the world by releasing it under a Creative Commons license. It also includes included public domain and licensed sound recordings.
Internet Archive is a non-profit library of millions of free books, movies, software, music, websites, and more.
Online since 2003, IPA Source is the web's largest library of International Phonetic Alphabet (IPA) transcriptions and literal translations of opera arias and art song texts. Now with over 7075 texts including 1216 aria texts.