Complex sentence: C-Tools 2.5, an updated and expanded version for Palm OS and Windows Mobile, was created for the American Cancer Society by Barry Tolnas and released in 2008, but as of April 2012 there are no references to C-Tools on cancer.org.
Split into simpler sentences: C-Tools 2.5, an updated and expanded version, was created for the American Cancer Society by Barry Tolnas and released in 2008. As of April 2012 there are no references to C-Tools on cancer.org.