Use SEOMoz Or you can choose the Raven tools for the finding the keyword competition websites for your competitor.
I like to use Spencer Haw's Long Tail Pro. It will pull the top ten SERPs for each keyword and summarizes a lot of competition info. Market Samurai does it too, but for me it runs much slower. Spencer also has a monthly analysis plug-in that will give you a weighted competition number using all of the different factors. $14.95/mo, but worth it if you are evaluating a lot of keywords every week.
google adwords tool is best to find competation. and if you want to check hot searches and privious searches bay graph then google trend is better one's
Try www.semrush.com its free and best to find out who are your competitors and which keyword in particular are they focusing on, with traffic and backlink stats. Hope this helps.
The simplest and freest tool is still Google itself (not the keyword planner tool). Take your main keyword phrase and add quotes ("") to it in the search bar. The hits you get back are the number of sites that are using the kw in the article title and/or url of their sites. Generally a number of hits lower than 30,000 is excellent, though under 100k is still good.
I couldn't get you at that time but now I do. Thanks for it. Yeah GOOGLE can help me to find the keyword competition by looking if 1st page is dominated by some BIG BOYS like wikipedia or not. Other then, Why I need tool was like the SEO services provider says that the Keyword Competition should low if they want to get ranked from their PARTICUAL SERVICE or so. Thats the reason I want to check if my blog/site is of low competition, medium or high. Thanks all guys for help.
Try www.semrush.com . It will show competitors in your niche and also show top keywords of your blog.