I recently was visiting the Vernier website, and found a list (with lots of links) of the sensors that are available.
There are over 30 of them. Here is the list of Vernier Sensors that can be used.
Vernier has sensors to check barometric pressure, acceleration, pH and Oxygen sensors, UVA, gas pressure and many more. The sensors will work with LabView or the Mindstorms NXT software. There is only 1 download block