This post covers 4 free and paid keyword tools. Determining the best keywords possible is vital to your sites success. 1. First up is the very firmilar Google Keyword Tool, this can be found within your Adwords account. It's usually everyone's first keyword tool being that it's a free option. The traffic figures are not exactly accurate but this platform does provide a good list of keywords. 2. Longtail Pro- This program focuses on finding more of the longer uncommon keywords, which usually have less competition and easier to rank. This program is not free but they do offer a free trial. 3. Wordstream Keyword Tool- Yet another keyword tool that gives you so many free searches. This comapany offers many other tools and services for SEO. 4. Keyword Tool- A free tool and doesn't require signing up for an account. It is similar to Google as it uses Google's Autocomplete to find it's longtail keywords. Using this Autocomplete method isn't saturated and still unknown by many. There are a lot of Keyword Tools available but after using these four options you should have all the keywords you need.
Well you forgot some amazing tools like http://kwalert.net/ (to receive mails about new keyword opportunities), market samurai, and Google keyword planner! BTW, nice share. Keep it up.
LTP is nothing but hype. they are offering 10 days trial for $1. try that yourself and you will see. Most of the times, it comes up with no results for your queries due to insufficient volumes. Personally, I would go with moz keyword explorer for keyword research purpose.