For On Page Search Engine Optimization (SEO), it is important to keep track of external links and see whether they are dofollow or nofollow. In fact these things are important for Google PageRank building of the site as well. In webmaster tools, you can find number of backlinks that your site is getting, but then are you diverting your backlinks to some other place as well. That can be found using some online tools which can create a report with details like external, internal links with dofollow and nofollow remarks.
Mozilla Firefox users can install SeoQuake add-on to see number of external and internal links on a web page. If you want to get the list of external and internal links and then dofollow and nofollow links, you should try online application like SEO tool on search matrix and Internal Link Checker Tool. These two places can list the external and internal pages linked from a particular web page. Here is the list of places to find external, internal links on a page,
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If you are really serious about the on page seo of your website, then keep an eye on the links going outside your website. Share your favorite tool for checking the outbound links of a webpage.