TweetRater is a Chrome extension developed by Sparklin Labs that allows users to rate tweets from their stream as valuable or pollution. With this extension, users can keep a total score for each of the people they follow, helping them make informed decisions about whether to continue following them or not.

The main feature of TweetRater is its ability to rate tweets as valuable or pollution. This allows users to categorize and filter the tweets they see in their stream, ensuring that they only see the content that is relevant and meaningful to them. By assigning a score to each tweet, users can easily track the overall quality of the tweets from the people they follow.

Another useful feature of TweetRater is the ability to keep a total score for each of the people in the user's follow list. This score provides a quick overview of the overall quality of the tweets from each individual, making it easier for users to decide whether someone is worth following or not.

Overall, TweetRater is a handy Chrome extension for users who want to have more control over the tweets they see in their stream. With its rating and scoring features, users can easily filter out irrelevant or low-quality content and focus on the tweets that matter to them.