Kingfisher/Pulse
Magic Roundabout
The 9
Highwayman
Lambton Worm
Metrocentre Mini
Voltra (surprised that one hasn't been mentioned yet)
Simplicity
See it do it Sunderland
South Tyne
Sunderland Connect (OK I think this is a Nexus brand but still)
Derwent Ranger
Toon Link
ToonTour
AD122
Venture
Little Pinks
Sunderland District Berries/Blonde/Blue (RIP)/Cherry/Graphite/Silver/Violet