Refined Twitter - A browser extension that improves the Twitter experience
Detox for Facebook - Replace your Facebook feed with PH, HN, DN and more.
Tweetbot - Sync your timeline across your iPhone, iPad, and Mac. Mute tweets by user, hashtag, tweet source, or keywords (including regex). 3rd Party support for image, video, read later, and timeline sync services.
Focus - New Tab page that gives you a moment of calm and inspires you to be more productive.
ilo - Premium Twitter analytics
FriendFilter - Auto unfriend tool for Facebook