There are plenty, but you may need a low profile card if your desktop has a small case, check before making a decision.
ATI;3450, 4350 and 4550 series.
Nvidia; 7200, 7300, 8400, 8500 and 9400 series.
All of the above should do the trick.
The ATI cards are better at DVD and Blu-Ray decode but Nvidia offer more low profile options.