If you are in the internet marketing business, you should know which niche market you are going to enter. One way to determine this is by looking its supply and demand. You can find out a topic demand from google adwords. There, you can retrieve number of search of particular keyword in one month. Then you can find out it’s supply by searching at google search engine. The number of pages in the Search Engine Result Page is the supply for the market.
I have just created a simple application which you can enter a list of your keyword, and it will generate the number of competitor for those keywords. Hopefully, If you want additional feature and difficulties using the software, contact me and I will respond.