The document lists over 100 social media, blogging, and content sharing platforms. Some of the major platforms included are Facebook, Twitter, LinkedIn, YouTube, Pinterest, WordPress, Tumblr, Flickr, Reddit, and others. The list appears to catalog a wide range of sites where users can create, share, and discuss multimedia content including text, images, videos, and more.

1. 500px.com
about.me
academia.edu
artblog.fr
arteblog.com.br
authorstream.com
bcz.com
bigsight.org
bloa.pl
blog.com.es
blog.student.pl
blog4u.pl
blogbaker.com
blogcindario.com
bloggproffs.se
blogigo.de
blogmonster.de
blogspot.com
bloguedoido.com
blogvie.com
blogymate.com
bungie.net
buzznet.com
canalblog.com
ccmixter.org
cdesite.com
centerblog.com
clipmoon.com
cookeatshare.com
docstoc.com
doomby.com
dribbble.com
dudepins.com
e-monsite.com
edocr.com
edublogs.org
esporteblog.com.br
estranky.cz
etsy.com
facebook.com
fashionblogg.se
flixya.com
flog.pl
folkd.com
fotopages.com
foursquare.com
freeblog.hu
futblog.com.br
gamingblog.com.br
gays.com
getglue.com
glogster.com
goodreads.com
gospeltube.com
grindtv.com
hautetfort.com
identi.ca
infoblog.cz
instructables.com
issuu.com
journalspace.com
judysbook.com
jukeboxalive.com
jux.com

2. kazeo.com
kl1p.com
linkedin.com
list.ly
livejournal.com
liveleak.com
lookuppage.com
loveblog.com.br
manteresting.com
metacafe.com
metroblog.com
mixcloud.com
motortopia.com
mouthshut.com
myblog.de
myplick.com
myspot.pl
netlog.com
nexopia.com
ology.com
ourstory.com
paper.li
pinterest.com
plerb.com
punchpin.com
quora.com
reddit.com
remcloud.com
sails.pl
scribd.com
skyrock.com
slashdot.org
slideboom.com
slideserve.org
slideshare.com
solidairesdumonde.org
soundcloud.com
soup.io
spaceblog.com.br
springpad.com
squidoo.com
startupnation.com
storify.com
streemo.pl
taringa.net
thatshow.com
tribe.net
tripadvisor.co.uk
twitter.com
ufosocial.com
unblog.fr
vimeo.com
vuvox.com
webeden.co.uk
weblogplaza.com
*marked as SPAM*
weheartit.com
wikihost.org
wikispot.org
wordpress.com
xing.com
xstreamist.com
yelp.com
yudu.com

3. zimbio.com