I have just added a link to Editage Insights on the blog roll to the right of the front page. This is not quite an online tool as I define it, but definitely a useful ressource for researchers. This is how Editage describes this relatively new platform:
Editage Insights is a dynamic blog designed to educate authors, connect journal editors with authors and vice versa, and allow people to engage in discussion about key developments in the academic publishing industry. It is available in English, Simplified Chinese, Japanese, and Korean, and thus has a wide reach, especially in East Asia, an emerging research hub. Some of the key highlights Editage Insights offers are interviews with journal editors and industry experts, a Q&A forum for authors seeking advice on the publication process, and updates on training programs conducted by Editage.
The service is an initiative from Editage, a editing service specialized in scientific publishing.