Thicknesser renovation project:
kulalinemilanost.blogspot.com
Largest manufacturing community in the web:
practicalmachinist.com
German hobby-machinists:
forum.zerspanungsbude.net
France hobby-machinists:
usinages.com/forums/
Useful historical database lathes, milling machines:
lathes.co.uk
Useful database woodworking machines:
hoechsmann.com/lexikon/filter.html
Hobby machine-builders from USA:
bbs.homeshopmachinist.net/forum
Vintage machinery forum - USA:
vintagemachinery.org