  We describe GTApprox - a new tool for medium-scale surrogate modeling in
industrial design. Compared to existing software, GTApprox brings several
innovations: a few novel approximation algorithms, several advanced methods of
automated model selection, novel options in the form of hints. We demonstrate
the efficiency of GTApprox on a large collection of test problems. In addition,
we describe several applications of GTApprox to real engineering problems.
