1. Keyword global/local searches
2. Show recent top searched keywords
3. Suggest low-competition keywords with potentials to top them.
4. By which, you can check your article's current rankings in Google, Yahoo, Bing etc.
sort by best latest
Not exactly you'll find a FREE platform that does what you ask. The best you'll find is Google Analytics/Google Keyword Tool as a combo. Otherwise, you'll need to pay for a platform such as Omniture.
You can help the HubPages community highlight top quality content by ranking this answer up or down.
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