L2 Syntactic Complexity Analyzer
L2 Syntactical Complexity Analyzer (L2SCA) developed by Xiaofei Lu at the Pennsylvania State University, is a computational tool which produces syntactic complexity indices of written English language texts. Along with Coh-Metrix, the L2SCA is one of the most extensively used computational tool to compute indices of second language writing development.
Source: Wikipedia — L2 Syntactic Complexity Analyzer (CC BY-SA 4.0)