Will biometric authentication devices integrate with in-house software?

The simple answer is: All the biometric devices on the market will work. But I guess this requires a qualification. Biometric authentication devices, from USB finger readers to keyboards with integrated readers, are all recognized by software as input devices, like a mouse, keypad or keyboard. Along with the device, you get the OS drivers so your system recognizes the device when it's plugged in.

I've experimented with several biometric devices and found that they are easy to use and integrate into my software modules. Since you developed your own software, you'll have to ensure you can call out the device and are able to hook into the repository where the biometric credentials are stored (whether locally or at the enterprise level). As I stated above, they're fairly easy to integrate; the part that could be hard is how flexible the authentication module of your software is.