In no particular order. Unless otherwise indicated, all these sites are in English.

Marco Guidi's planetary high resolution
Melis Cornelis-observatory by Corne Hoogendoorn
Excellent astrophotography gallery by Neo
I See Far Ivar Kooren
Views of the solar system by Damian Peach
La web de astrofotograf�a de Ram�n Delgado (Spanish)
Ed TingTelescope Reviews
Astrophotography by Dennis Put
Marco Guidi's high resolution astroimages
Astrophotos by Jacob Bass�e
Notte stellata, blog by Davide Manca
JTW Astronomy astrophotography solutions
8" F/2.75 ASA Astrograph Gallery Albert van Duin
Marcel Ooms (Dutch)
Ronn Franken Stardust Observatory Stadskanaal (Dutch)