1. Tools
1.1. Sharing Video
1.1.1. Twitvid
1.1.2. Twitc
1.1.3. Twiddeo
1.1.4. Tweetube
1.2. Research tools
1.2.1. Twtpoll
1.2.2. Trendrr
1.2.3. Tweetstats
1.2.4. Strawpoll
1.3. Others
1.3.1. groupTweet
2. Hobby
2.1. For example: Cooking
2.1.1. @
2.1.1.1. Masterchef home cooks
2.1.1.1.1. New node
2.1.1.2. Popular cooks' blogs
2.1.1.3. Friends that have the same interest
2.1.2. #
2.1.2.1. Masterchef TV show
2.1.2.2. Cooking recipies
2.1.2.2.1. New node
2.1.2.3. Cooking Tips
2.2. Music
2.2.1. different tools to share musics
2.2.1.1. twiturm
2.2.1.1.1. New node
2.2.1.2. imeem
2.2.1.3. twittytunes
2.2.1.4. Song twit
3. Study
3.1. @
3.1.1. Teachers
3.1.1.1. New node
3.1.2. Friends
3.1.2.1. New node
3.1.3. Tutors, advisors
3.1.4. people that share the sames interest in specific area of studying
3.2. #
3.2.1. Exercise
3.2.2. Discussion
3.2.3. Studying Follow up
4. Business
4.1. @
4.1.1. Business leaders
4.1.2. World's leader experiences
4.2. #
4.2.1. hashtags of personal business ideas