This paperdescribesthe conceptual model of Strudel, a toolkit of generic components for conversation and action management. To empower work groups to more effectively conduct their computer-based communication, coordination, and information sharing activities, Strudel packageswithin a simple model of task and action the semi-structured message, active message and conversation management paradigms. To facilitate acceptanceand use within varying work cultures, we define this model in terms of a set of extensible components, which are implemented as a prototype software toolkit that is efficient, portable, customizable, and extensible. Issues considered briefly in this paper include threading in conversations that are converging or multi-party, and interoperability betweenactive messagesystems.