A couple of them are already known by many but there are some that I never heard of that seem really interesting. I do not tweet enough to be looking for tools but I will be checking them out in depth over the next week.
I just looked at the whole list and noticed most of it is for personal rather than consumer use. I wonder if any of these tools can help business clients increase their lead or client base power.
I noticed the same and I think that these can be used for small businesses that are trying to do some marketing and outreach on limited budgets where as the corporate twitter tools that I wrote another thread on are more for the bigger boys.