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The Collaborative Testing System (CTS) tests parallel software using various implementations of MPI. It works on multiple platforms and supports batch systems including LSF, LCRM and workstations without a batch system. It includes a numerical diff tool.
A source code diff tool. Adapted from cvsweb, it makes code inspection easy. It also provides another diff tool with which you can either compare two files or two directories recursively. It is written in perl and uses String::Ediff for finer diff.