A set of utilities for generating web computing environments related to mathematical and engineering library software is presented. The web interface can be accessed from a standard world wide web browser with no need for additional software installations on the local machine. The environment provides a user-friendly access to computational routines, workspace management, reusable sessions and support of various data formats, including MATLAB binaries. The creation of new interfaces is a straightforward process. All necessary web pages are automatically generated from XML description files. The integration of the control and systems library SLICOT demonstrates the efficacy of this approach.