Jabarkan Bibliography of editions (omarkhayyamnederland.com) dari Rubaiyat Omar Khayyam

The illustrated Rubáiyát of Omar Khayyám, translated by Edward Fitzgerald, at Internet Archive.

The Persian Poet, contains the translations by Edward FitzGerald and a biography.

Project Gutenberg: etext#246 (translation by Edward FitzGerald)

The entire book in DNL E-Book format.

The complete four edition translations by Edward FitzGerald, with illustrations by Blanche McManus at Kellscraft.com.

Database of manuscripts of the Rubáiyát of Omar Khayyám (cam.ac.uk)

Rubaiyat of Omar Khayyam  a collection of rubaiyat in Persian, accompanied by several translations into English and German.

A comparison between the translations by Heron-Allen and Talbot.

Syracuse University's Special Collections Research Center has in its Rare Books holdings more than 300 different editions of the Rubaiyat

The Harry Ransom Center  at the University of Texas at Austin holds over 1,500 items related to the Rubaiyat, including two copies of the first edition, hundreds of editions, translations, and parodies, several Persian manuscripts containing rubaiyat, and ephemera, manuscripts and correspondence documenting the phenomenon of "Omariana"