Wikimedia
Wikipedia: Catullus
An encyclopedia article from Wikipedia on Roman poet Caius Valerius Catullus discusses the common themes of his poetry and how his erotic and irreverent poetry was different and controversial during its time.
Able Media
Able Media: A Modern Student's Guide to Catullus
The Modern Student's Guide to Catullus by Raymond M. Koehler brings the poems of the Roman poet Catullus and the Latin language to life through song and story.
Other
Gaius Valerius Catullus
Good introductory biography of the Roman poet Catullus. Explores not only the man but his work as well, focusing on the influence of Alexandrian and Hellenic poetry on his own poetry. Cites his poems as support for the facts of his life.