i got couple more resources for keywords. They are free. It mite help. Btw...this one used for google. AKA google adwords
https://adwords.google.com/select/ma...KeywordSandbox
This is quite a good website. they have got 3 tools here.
http://www.webconfs.com/index.php
One is Google Backlink checker. It actually tells you the anchor text that you put for the links. Quite neat.
other 2 are similar page checker used for duplicate content and search engine simulator.