To my knowledge, this is the most comprehensive list of Urdu stopwords. Libraries on the web either don't contain urdu stopwords, or their lists contain many words that aren't Urdu. (I don't know many other languages but it seems most of the words in their lists are from other languages.)
This list was compiled with regards to creating worclouds/tagclouds in Urdu, and might be best suited for this, but it is hoped that it will be useful in other applications.
Please contribute to the list. Everything that works in English does not work in Urdu. Please do something about it.