CUDA Applications
Here are some fun applications which take advantage of parallel processing using NVIDIA's CUDA architecture:
Distributed Computing:
"GPUGRID.net is a novel distributed supercomputing infrastructure made of many NVIDIA graphics cards joined together to deliver high-performance all-atom biomolecular simulations."
GPUGrid optimizations thread
NVIDIA GT240 Superclocked info an optimization article is here and some Tom's Hardware info on overclocking this card is here
http://setiathome.berkeley.edu/cuda.php Seti] The classic distributed computing app, for CUDA.
Collatz Conjecture Distributed mathematics
Security / Hacking:
"WPA/WPA2-PSK and a world of affordable many-core platforms"
"RainbowCrack is a general propose implementation of Philippe Oechslin's faster time-memory trade-off technique. It cracks hashes with rainbow tables."
Amazon GPU Instances
Using Amazon's EC2 GPU instances to crack SHA1 hashes is described here
Applied Research
An interesting paper titled Accelerating Reed-Solomon Coding in RAID Systems with GPUs” by Matthew Curry, Lee Ward, Tony Skjellum and Ron Brightwell, IPDPS 2008 is described in this post
