Complex sentence: Turnitin released the WriteCycle Suite on February 3,2009, which bundles the Originality Checking service with its GradeMark online grading tools and PeerMark tools.
Split into simpler sentences: Turnitin released the WriteCycle Suite on February 3,2009. WriteCycle bundles the Originality Checking service with its GradeMark online grading tools and PeerMark tools.