Absurd gizmo

When surfing, since I can't read the whole Internet, I've become a compulsive bookmarker...has this happenned to you?. Well, maybe not so compulsive, since many of the bookmarks are very worthy. These juicy bookmarks are the ones shown, although with such long list I've created categories for better funcionallity. I've tried to make short list just not to get lost, any suggestion is accepted. Some links may break, please report and I'll try to update ASAP.