Deepdapper is a project mainly written in Perl, it's free.
Extension of YQL deepdapper table, to plit the query over multiple YQL calls, not to bump into YQL's rate limits.
Information on deepdapper.pl is found on http://www.google.com/url?q=http%3A%2F%2Fdocs.google.com%2FView%3Fid%3Dddq89pzk_199f54jdwcb