I found following tools very useful to know your web performance:

  1. popuri.us – Check your ranking and popularity on a variety of sites including Alexa, Google PageRank…etc
  2. socialmeter – Check your website’s social popularity on sites like Digg, Furl, Jots…etc
  3. Statsaholic – Compare rankings and other information on up to three websites at a time.
  4. SiteVolume – Compare how often keywords show up on any site you select.
  5. Webslub – Compare your site’s performance to any other site.

Later I will post an article about Web Analytics. I have to say that good Web Analytics solution is really expensive.