Astrophotographers
Andrea Bavaro
Massimo Bernardi
Giuseppe Passera
Saro Pomillo
Marco Cianci
Stefano Pesci
Lucio Tellini

Leonardo Orazi
Antonio Agnesi
Cristina Cellini
Michele Franci
Lorenzo Comolli
Carlo Rocchi
Jeff Signorelli
NIcola Montecchiari

Forums
Astrofili.org 
Cloudy Nights

Other sites
My personal Flickr space