Doing some experiments with data at work, one of the common tasks was "show top X items". However X was changing all the time. Finally I came out with a web based UI where you can set the top yourself. Hopefully someone else will find it useful.
At work, we use Crucible (which I mostly like). However we do reviews post commit (using feature branches). And creating a review from a patch is too much clicks to my taste. Hence crucible command line client. You can install it with easy_install crucible and then run it.