There are no absolutely proven tools anywhere on the internet which can help you optimize your website SEO-friendly completely. Though there have been attempts to create many such tools it has marginally helped webmasters. But there is no harm in trying such tools as far as you don’t see any negative reviews that are proven. Stay away from dangerous tools which uses certain black tools, it’s very hard to distinguish but all you have to do is research and take the decision.

Google Keyword Tool is one of the most preferred tool to check for keywords that you can utilize for a better search engine result. You can get varied information about a certain keyword depending on the options you select. Plus, you can also check out the payout of the keyword, the price advertisers have bid on. It would also show you number of searches from a particular country, so that you can target a specific set of group. If you haven’t tried it yet you are missing something very useful.
I really do not want to mention other tools in here because I do not want you to use something that I recommend and not see any positive results. It happens all the time; I would really need to know what website you own so that I can guide you through the steps. In any case work on keywords since it is what matters more than anything. That is how people get into your website from a search engine. Focus on what people are in need of, try various combination of plan.
If in any case something isn’t working for a long time then switch to some other plan. All I can suggest you just ride the Google wave. It is here to stay. I am sure you use Google a lot and just think from the perspective of a normal user. What would he be searching for in order to get search results. It is as simple as that, so good luck.