Sigma Micro, a enterprise software firm, has finalized its purchase of Denver, Colorado-based Quark's Quark Commerce software product. Sigma Micro said yetserday that it has acquired the application code and supporting documentation, hired a number of key product personnel, and acquired the customer's of Quark's Commerce product. Sigma Micro had agreed to acquire Quark Commerce in June. Terms were not disclosed. Quark Commerce helped customers manage orders, inventory, and shipments, and was sold as Quark focuses on its core publishing software business.