'FitBenchmarking': an open source 'Python' package comparing data fitting software.

• Scientists, who want to know the best algorithm for fitting their data to a given model using specific hardware. • Scientific software developers, who want to identify the best fitting algorithms and implementations. This allows them to recommend a default solver, to see if it is worth adding a new minimizer, and to test their implementation. • Mathematicians and numerical software developers, who want to understand the types of problems on which current algorithms do not perform well, and to have a route to expose newly developed methods to users.