I tend to check the PageRank on some of my sites once in a while and I can never remember which site I used the last time. This meant I farted around looking for one that doesn’t involve a catchpa or try to sell me something while I am using it. With this in mind I wrote my own PageRank Checking tool, now I no longer need to go hunting anymore.
I am seriously considering creating a whole suite of tools to check things like:
Yahoo and google backlinks
pagerank
indexed pages
alexa ranking
quantcast ranking
etc etc
When I want to see any one of these things it would be nice to see them all.