The Silver Photoshop action is a great choice for black & white conversions. Silver applies a beautiful black & white conversion that works well with a wide variety of photos. This action is a free sample from our Photoshop Elements Actions Bundle. The full set includes a total of 100 actions for Photoshop and Photoshop Elements. Silver comes with a version for Photoshop (CS4+) and a version for PSE (11+).
You can see some sample before and after photos below.
If you want even more Photoshop actions check out our Ultimate Photography Bundle, which includes more than 700 different actions.