In 2015, we converted cBench to open Collective Knowledge Format (CK) and moved it here:
http://github.com/ctuning/ctuning-programs
CK allows you to simplify compilation and execution of these benchmarks across multiple platforms (Windows, Linux, MacOS, Android ...).
Collective Benchmark (cBench) is a collection/extension of open-source programs and multiple datasets to enable realistic benchmarking and research on program and architecture optimization.