Adam Schneider's Guitar Files - Chords and tablature for songs by varied artists. Includes guitar files, links and contact details.
Fretplay.com - A substantial collection of tabs for guitar (and some for bass), with discographies and CD reviews, and a forum.
iTabs.nl - An archive of several thousand tabs, organized by artist, in a variety of genres; includes a number of non-English singing European artists.
Tab Classics - A personal collection of the author's tabs, mostly of classic songs; includes a few arranged for acoustic fingerstyle guitar. Also offers a guide to using tablature.
Ultimate Guitar Archive - A sizeable archive of tabs. Also has a forum, lessons and reviews.
Video Game Jam - Guitar tablature for video game music; also includes MIDI files.
Xclusive Guitar Tabs - Diverse, small collection all tabbed by the site owner, Frederic Maquet.