Biblioteca dei Classici Italiani (di Giuseppe Bonghi da Lucera).  Collection of almost 500 full-text Italian classics divided by period and author. Includes as well  biographies, bibliographies, and introductions to the works of the most important Italian writers.

Biblioteca digitale della letteratura italiana  (Einaudi)  -  Opere, Autori.

Bivio: Biblioteca Virtuale On-line.  Testi e immagini dell'umanismo e del rinascimento.

Libretti d'Opera Italiani  Searchable by: author of the text; author of the musical score; by title of the work or by century. Includes songs in mp3 format.

Letteratura.it   Il primo portale a servizio della letteratura Italiana.

Liber Liber   Libri, Audiolibri, Musica, Video.  An extensive full-text e-library for Italian literature (out of copyright).

DGA Direzione Generale Archivi (Ministero per i beni e le attività culturali).  Il Sistema Archivistico Nazionale e i Portali tematici

il Fondo Manoscritti dell’Università di Pavia (Centro di ricerca sulla tradizione manoscritta di autori moderni e contemporanei)

Medici Archive Project  The Medici Archive Project is bringing the Medici Granducal Archive's unparalleled resources for the arts and humanities to a broad international public for the first time, by way of the latest information technology. ... Open to the general public, the online system allows users to search for people, places, topics and document synopsis and extracts in the thousands of documents indexed by MAP researchers, with new information updated every day. This digital interactive platform enables scholars from all over the world not only to view digitized images of  archival documents, but also to enter transcriptions, provide scholarly feedback, and exchange comments in designated forums.