Addmefast - Building a website or network on Internet is no longer a hard task but promoting and marketing it is still a difficult task but not impossible.
TweetDeck - TweetDeck is your personal browser for staying in touch with what’s happening now.
YouLikeHits - YouLikeHits is an online service that brings results within seconds.
Twitterfall - Twitterfall is an excellent choice if you want something basic, free and without much branding.
LikesPlanet - Get Facebook likes, Twitter Followers, YouTube Subscribers, Comments, and Shares.
Tweetdeckr - Tweetdeckr is an open source Tweetdeck replacement client.