I have just developed a very simple keyword analysis tool which would allow visitors to check the number of keywords they have used in their web page/article/paragraph and in the process save themselves from committing keyword stuffing within their articles.
It works by allowing visitor to enter the number of keywords (one on each line) and then paste the article in the next text box. Then the visitor just needs to click on the Generate button and the system will calculate the number of times a particular keyword has been used in that article. The keyword which has been found will show up in the Found Keywords text box and the ones not found will be shown in the Not Found keywords text box.
Here is the keyword analysis tool