Taken from the project website (Accessed 2017-03-06):
This website offers a critical edition of the poems of Catullus, a repertory of conjectures on the text, an overview of the ancient quotations from Catullus that have independent source value, and high-quality images of some of the most important manuscripts.
A full repertory of conjectures on Catullus is presented here in a critical apparatus alongside his poems. It is published in the first instance online in order to make it accessible for the widest possible public, and to render future updates possible. An edition on paper with a detailed introduction is also being prepared.
Every effort has been made to include every conjecture on Catullus that has been made so far, with certain limitations. Whoever publishes a new conjecture, or discovers one that has been omitted or wrongly ascribed, is asked to contact the editor.
The repertory aims to include all conjectures on Catullus that have been published in print since the editio princeps of 1472. Hitherto unpublished conjectures by scholars who are no longer alive, and readings of interest that arose not as conjectures but for example as misprints, are included at the editor’s discretion. The repertory is not intended to serve as the first place of publication for new conjectures; those who would like to publish one are directed towards specialist journals.