Comment Comedi & RTAI (Score 1) 250
During my PhD research project in experimental physics I needed some fast (~200 microsec. resolution) Digital IO, but there was not enough money to buy a NI card with onboard memory. We did have an older NI card (PCI-6024E) with several DIO lines. I then used the drivers from the Comedi project [www.comedi.org] in combination with the RTAI real time kernel [www.rtai.org] to write a program that clocked out the desired timeing with approximately 20 microsec. resolution.
So if you don't want LabVIEW, but do want OSS drivers for your NI card, comedi is the way. Of course, this means you'll have to program in C.