Trending Sites for Titles and Subject Matter (Ride The Wave)

Trending Topics on Huffington Post
http://www.huffingtonpost.com/tag/trending-topics

Whats Hot Google+ (trending)
https://plus.google.com/explore

Personalized Real Time News + Trends
http://inagist.com/

Twitter Hashtags Search Engine
http://hashtagify.me/

What The Trend
http://whatthetrend.com/