Refined Twitter - A browser extension that improves the Twitter experience
ilo - Premium Twitter analytics
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.
Accountanalysis - A tool to evaluate Twitter accounts
Tweetastic - Better Twitter analytics, scheduling and more
Tune by Google - AI-powered Chrome extension that hides toxic comments