YNCooperation 1.1.1 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The application is categorized as Communication Tools. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. This free software for Mac OS X was originally developed by NetEase Inc.
From the developer:
YNCooperation is a professional team information management service. It provides team collaboration tools based on information management and communication, and it can be seamlessly connected to your personal Youdao note. Team members can edit together the same document.
You may want to check out more software for Mac, such as PhoneAmego, VoIP Tracker or PastebotSync, which might be similar to YNCooperation.