I have used many tubes to create some of my graphics. Credit for the tubes will be found here; this list is an ongoing project so please bear with me, thanks.

Cricket's PSP Tubes
Hunter Tubes
Lori's PSP Tubes
Tubes
Tubes
Freemo Graphics & Tubes
Pat's Tubes
Tina's Tubes
Tubes
Rhonnie's Tubes
Baby's Breath
Tubes
Gentle Impressions
Roseann's Tubes
Tubes
Tubes by Wysdom
Tubes by LC
Lady Archrr's Tubes
Jane's Place Tubes
Tubes by Calicatt
Tubes by ShadowyMist
Tubes by Beths Haven
TubeTown