Credtwi is a Chrome plugin developed by Eetu Huusko that allows users to rate the credibility of tweets on their Twitter timeline. This plugin adds an additional button on the bottom bar of each tweet, providing users with a simple and convenient way to express their opinion.

With Credtwi, users are presented with a small question box under each tweet, where they can rate the credibility of the tweet on a scale from 1 to 7 using a slider. Additionally, users are encouraged to justify their rating in a text box, allowing for more detailed feedback.

The plugin also features a popup with buttons to access questionnaires, providing users with the opportunity to contribute to crowdsourcing research. In addition, there are three buttons to access trendy topics, enabling users to stay updated on the latest discussions.

Credtwi is a valuable tool for gathering users' opinions on tweet credibility, making it a useful resource for researchers and those interested in understanding the credibility of information shared on Twitter.