Abstract: This study surveys current asynchronous collaboration tools and their features. Asynchronous collaboration tools, that allow users to collaborate at different times, have evolved from email, discussion board, weblogs and Wiki to advanced tools that integrate multiple functions to make collaboration more powerful and convenient. A great number of such tools have been developed that provide a variety of different features. This study investigates the available features of these tools, the meanings of these features and identifies common and key features. We organize features by four major functional categories: communication, information sharing, electronic calendar and project management. We tested ten asynchronous collaboration tools that present different ways of collaboration and different sets of features. Data collected in this study come from our experiments and online documents. This study will help users gain knowledge of what current asynchronous collaboration tools have to offer and help them select right tools based on their needs.