Here is a list of Free 8 Keyword Research Tools (add yours too)

I didn't saw any such thread and there were few questions asking this so thought to create a thread listing list of Free major keyword research tools -

Free Keyword Research Software and Tools

1. TrafficTravis
2. Google Trends
3. Bing Ads Intelligence
4. Youtube Keyword Tools
5. Bing Keyword Tool
6. Google Keyword Planner
7. Soovle
8. Google Correlate

You can post more such tools as reply and I will try to add them in the list

EDIT - I can't post the urls unfortunately, so here are the urls in text format

http://www.traffictravis.com/
http://www.google.com/trends/
http://advertise.bingads.microsoft.com/en-us/bing-ads-intelligence
https://www.youtube.com/keyword_tool
http://www.bing.com/toolbox/keywords
http://adwords.google.com/ko/KeywordPlanner/Home
http://www.soovle.com/
http://www.google.com/trends/correlate/

 

Some keyword research tools are given on these pages too:
1) http://www.1stwebdesigner.com/design/20-free-keyword-research-tools-comprehensive-insight/
2) http://www.iacquire.com/blog/the-best-free-premium-keyword-research-tools
Hope this helps.

 

Try Hittail keyword tool, it is one of the best out there. The tool not only suggests keywords but also gives a choice to get articles written for them too!

 

Thanks for sharing. Very useful indeed. Hope others can also share other types of keyword tool.

 

Free Keyword Research Tools:
Bing Keyword Tools
Google Webmaster Tool
Youtube Keyword
Google keyword Planner

 

very good. Http://howgot.blogspot.com

 

Thanks for link to knowlege SEO