I'm one of those guys who uses TabMixPlus for my Firefox, since I like the behaviour of Ctrl-Tab to be like Windows-Tab, i.e. jump to previously opened tab. You also want this in eclipse, right? So, modify the key bindings in Window->preferences->keys and modify the 'next editor' to Ctrl-Tab ... and 'previous editor to Ctrl-Shift-Tab. Voila! (it'll also show a small window in the order of which the tabs were opened... that's just gravy ;) )
This is a simple blog to help me remember those cool code snippets which I used. Either by copy, or by cobbling... I do not intend this to be read by people except for me and my bad mind.