On the topic of code reading, can anyone endorse any tools specific to reading a code base, rather than development? I've been using vim and cscope forever, b

On the topic of code reading, can anyone endorse any tools specific to reading a code base, rather than development? I've been using vim and cscope forever, but I'm wondering if there's anything new and interesting out there. ...or even screencast recommendations of folks that are particularly proficient at this.