Hi friends...! I like using articles, blogs and press releases! They work for me and I get great traffic.
I have never used DNscoop.I have used wordtracker and gostats hit counter daily for analyzing my website.
Google keyword checker is the tool I mostly used. seochat, wordtracker sites also provide valuable tools.
Yes I like your points for keywords analysis tool. We can also use Google adwords tool and word tracker.
I always like to use those tools, 1. Google analytics 2. Google webmaster 3. Google adwords 4. Google website optimizer 5. SEO moz
Some of SEO Tools I mostly used are: Google Analytics, Google Keyword Tool, Google Webmaster tool, Opensite Explorer and some firefox plugins like SEopen tool, search status and rank checker.