stock screening software?

Answer 1

Take a look at AAII's Stock Investor Pro:

http://www.aaii.com/stockinvestor/intro/

However, there are many very good online screener products:

http://screener.reuters.com/screener/Landing.aspx
http://moneycentral.msn.com/investor/finder/customstocks.asp
http://prosearch.businessweek.com/businessweek/general_free_search.html?mode=advanced
http://www.stockfetcher.com/

There are dozens of others, but you didn't give enough detail on what you were specifically looking for.