Web 2.0

1. Social Reposititories

1.1. Youtube

1.2. teachertube

1.3. flickr

1.4. slideshare

1.5. slide

2. social bookmarking

2.1. delicious

2.2. citeUlike

2.3. digg

2.4. i-lighter

2.5. librarything

2.6. connotea

2.7. edtags

2.8. clipmarks