polsy.org.uk
Let's Play stuff
Let's Play archiving scripts information
Alternative players for video streaming sites
blip.tv
(defunct)
Nico Nico Douga
Veoh
Viddler
(not technically defunct but mostly purged of consumer videos)
WeGame
(defunct)
YouTube
Anime rhythm games
BanG Dream (JP) events list
BanG Dream (JP) gacha campaigns
BanG Dream (JP) covers information
Theater Days (JP) events list
Theater Days (KR) events list
Theater Days gacha campaigns
Other things
Bare-bones iTunes search
Unicode string decoder
YouTube region restriction checker