axlsx has been out for a few months now. It has risen to the top of the crop of reporting tools on the rubytoolbox, nabbed a mentioned in ruby5, commented on in railscasts, twitted by a few of the core Japanese ruby and rails activists, and will be the subject of a LT at RubyKaigi in Sapporo this year - and it just now hit me…. rubyflow was left in the dark. Write real Office Open XML documents (xlsx) with charts, comments, styles and more - and validate it before you send it off to your clients. ::Real OOXML for real ruby devs::