(Update 06-11-09) Upon second look, sold the stock.
Got some Compuware (Nasdaq: CPWR) shares last week in my SogoTrade account (for speculation purpose). I used their DevPartner products (integrated with Visual Studio, sold to MicroFocus lately, see news below) for memory debugging and performance tuning. Very impressed by their products from my experience. It can catch some unexpected memory error (sometimes introduced inadvertently due to time constraints in development).