What are some alternatives?
Listomatic - Automatically create and manage Twitter lists
HitLyst - Use Twitter lists like a pro
News Feed Snooze - Hide a person, Page or group for 30 days on Facebook
Endorsed.Club - Mapping Twitter communities and the best users within them
Twitter Dashboard - Connecting businesses with fans, customers, and community
Otherside for Twitter - Use Twitter as if you were @Jack, or any user you like