You can try these sites:
Making Up Code

Yoocel.com

Whirlspace.com

Gen-Eff.net

Vtv10.com Active PR4 Bookmarking

TatvanStories.com

Inshareeb.com

SEO Friendly AOL Directory

Do Follow Bookmarking Site

WebStatsRank.com

Thanks for ur Information @nerdyjack56

Totally agree with you. But we need really interesting content too.

there are many social bookmarking sites

Thanks for the information.

Social Bookmarking sites

public.bookmax.net
bibsonomy.org
sitejot.com
linkagogo.com
folkd.com
pearltrees.com
killerstartups.com
youmob.com

Social bookmarking is a centralized online service which allows users to add, annotate, edit, and share bookmarks of web documents. Many online bookmark management services have launched since 1996; Delicious, founded in 2003, popularized the terms "social bookmarking" and "tagging".

some pages for u :

reddit.com
pusha.se
cndig.org
fark.com
digg.com
bibsonomy.org
linkagogo.com
jumptags.com

:D

Look on google

Social bookmarking is a centralized online service which allows users to add, annotate, edit, and share bookmarks of web documents. Many online bookmark management services have launched since 1996; Delicious, founded in 2003, popularized the terms "social bookmarking" and "tagging".

you can see a lot of on google
Wp domination secrets review

tumblr.com
evernote.com
ttlink.com
pearltrees.com
webnews.com
papaly.com

Here is link to list of social bookmarking and other stuff with dofollow links

Here is link to best article

Where is this link?