A somewhat peculiar website is: The Rubáiyát of Omar Khayyám, from Virginia Commonwealth University (Richmond, Virginia), that offers the Rubáiyát texts, (1st, 2nd and 4th renderings), a glossary, a bibliographical list, a short biography of Khayyám, a comparison between a number of quatrains by FitzGerald, the Persian text and a literal translation, and the introductions to the three editions.
Also there are two critical essays “Creating Another’s Work: Edward FitzGerald’s The Rubáiyát of Omar Khayyám. A bibliographical essay” by Katie Elliott, and “FitzGerald’s second. Additions and Textual Changes in the 1868 Edition of The Rubaiyat of Omar Khayyam” by Thomas Minnick. You’ll find these in the Criticism chapter.
The website is presented in the form of a book, with various illustrations from a number of artists. Unfortunately there is no year of publication, but it is from a later date than 2002.