Why not... I'll pin everything I can :P.
Baseball-reference has become one of my favorite websites... so much information, so little time.
EDIT: Added Baseball-almanac.com to your list, which will be home to all the resources listed. :)(
http://www.sportslogos.net/ (has images of every logo for every team ever used in the NHL, NBA, NFL, MLB, NCAA and English Premier league soccer)
http://www.nhluniforms.com(has images of every uniform ever worn by every NHL team--including jerseys, socks, shorts, and helmets)