This document discusses Dgroups, which uses communities of practice (CoPs) to facilitate knowledge sharing and collaboration among development professionals. It notes that Dgroups hosts over 800 CoPs with over 250,000 members who exchange over 500,000 messages daily. CoPs allow practitioners to regularly interact and learn from one another, both improving communication and problem-solving in a cost-effective and inclusive manner. The document urges development organizations to include CoPs in their strategies and commit support to maximize the potential of CoPs for achieving development goals.