Which of the following is not a synchronous groupware software application?

The choice of "Tweets" as the correct answer highlights the difference between synchronous and asynchronous groupware software applications. Synchronous applications allow participants to communicate in real-time, enabling immediate interaction and collaboration. This includes chat rooms, audio conferencing, and webinars, where users are engaged simultaneously, and responses occur without significant delay.

In contrast, tweets are not a synchronous form of communication. Posting a tweet does not require instant responses from others; instead, it allows for one-way communication where followers can engage with the content at their convenience, which may lead to delayed interactions. This distinction places tweets firmly in the realm of asynchronous communication, making it the correct answer to the question.